P R OT E C T I O N
Feeder Management Relays
MiCOM P14x feeder management relays provide an integrated solution for the complete protection, control and monitoring of overhead lines and underground cables from distribution to transmission voltage levels.
The wide range of auxiliary functions provides the user with sufficient information to efficiently maintain the power system and its components including circuit breakers, CTs, VTs, etc.
A customizable, friendly, multi-lingual user interface and programmable graphical scheme logic allows for simple and flexible applications on any network.
Connecting the relay to virtually any kind of Digital Control System or SCADA is made possible by the wide range of updated communication protocol and interface choices provided.
Customer Benefits ? 1A & 5A in same relay ? Wide auxiliary supply voltage range ? Option of multiple communication protocol and interface ? User customisable menu text
The MiCOM P14x range is suitable for all applications where overcurrent protection is required. It is suitable for solidly earthed, impedance earthed, Petersen coil earthed and isolated systems. First application shows a parallel transformer protection where the P141 replaces many of the discrete protection elements normally associated with the LV side of the transformer. The protection includes nondirectional and directional phase overcurrent and earth fault, restricted earth fault and circuit breaker failure protection. The second application shows a P143 protecting a plain feeder using phase overcurrent, sensitive earth fault, negative sequence overcurrent, thermal protection and breaker failure protection. The integral autorecloser with check synchronising can be configured to grade with downstream reclosers.
P141 51P 51N 67P 67N
Figure 2a: Typical parallel transformer application
64N 27 47 50BF
P143 51P 51N 49 46 50BF BC 79 25
Typical applications of P14x PROTECTION FUNCTIONS OVERVIEW 50/51/67 50N/51N/67N 50N/51N/67N 67N 67W YN 64 Directional / non-directional, instantaneous / time delayed phase overcurrent (4 stage) Directional / non-directional, instantaneous / time delayed, measured earth fault (4 stage) Directional / non-directional, instantaneous / time delayed, calculated earth fault (4 stage) Sensitive directional earthfault (SEF/ I Cosφ I Sinφ) (4 stage) Wattmetric earthfault Neutral admittance protection Restricted earthfault Blocked overcurrent Selective overcurrent Cold load pick-up Voltage controlled overcurrent Directional / non-directional negative sequence overcurrent RMS thermal overload (single / dual time constant) Phase and neutral undercurrent Under voltage (2 stage) Over voltage (2 stage) Residual over voltage (Neutral displacement) (2 stage) Negative sequence overvoltage Under frequency (4 stage) Over frequency (2 stage) Rate of Change of Frequency Protection (4 stage) Broken conductor (open jumper) Circuit breaker failure Voltage transformer supervision (1, 2 & 3 phase fuse failure detection) Current transformer supervision Silicon rectifier overload protection 4 shot three pole auto reclose Check synchronising Digital inputs (maximum) * Output relays (maximum) * Front communication port (RS232) Rear communication port (RS485/Optic/Ethernet) * Second rear communication port (RS232/RS485) * Time synchronisation port (IRIG-B) * P141 P142 P143
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
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51V 46 49 37P / 37N 27 59 59N 47 81U 81O 81R BC 50BF VTS CTS 49SR 79 25
* It may not be possible to get all in one particular model, refer data sheet for model selection
In addition to the wide range of protection functions listed in the table, all relays in the P14x range are provided with the following measurement, control, monitoring, post fault analysis and self-diagnostic functions. > Measurement of all instantaneous & integrated values > Circuit breaker control, status & condition monitoring. > Trip circuit and coil supervision > 4 alternative setting groups > Control inputs > Fault locator > Programmable scheme logic
> Programmable allocation of digital inputs and outputs > Sequence of event recording > Comprehensive disturbance recording (waveform capture) > User configurable LEDs > Local and remote communication ports > Multiple communication protocol and interface options > Time synchronisation > Fully customisable menu texts > Multi level password protection > Power-up diagnostics and continuous selfmonitoring of relay. > User friendly setting and analysis software
2nd Remote comm. port
Remote comm. port Self monitoring
Fault records Measurements
Vref I V IE sen
Binary Input / output
always available optional
Feeder management P14x
(Description of ANSI code nos. see Protection Function Overview)
Your search for a single box feeder management relay ends with MiCOM P14x
Four independent stages are available for each phase overcurrent element. Each stage may be selected as non-directional or directional (forward/reverse). All stages have definite time delayed characteristics, two of the stages may also be independently set to one of ten IDMT curves (IEC and IEEE). The IDMT stages have a programmable reset timer for grading electro-mechanical, to reduce autoreclose dead times and to reduce clearance times where intermittent faults occur. The phase fault directional elements are internally polarised by quadrature phase-phase voltages, and will make a correct directional decision down to: 0.5V (Vn = 100 - 120V) or 2.0V (Vn = 380 - 480V). A synchronous polarising signal is maintained for 3.2s after voltage collapse to ensure that the instantaneous and time delayed overcurrent elements operate correctly for close-up three phase faults.
SENSITIVE EARTH FAULT
A core balance CT should be used to drive the sensitive earth fault function. The directionality of the sensitive earth fault element is provided by the residual voltage.
As an alternative to the directional earthfault characteristic a directional I cos φ characteristic can be used for Petersen coil earth fault protection using the sensitive earth fault input. A directional Isin φ characteristic is also available for protection of insulated feeders.
BLOCKED OVER CURRENT
Each stage of overcurrent and earth fault protection can be blocked by an optically isolated input. This enables overcurrent and earth fault protection to integrate into a blocked overcurrent busbar protection scheme.
STANDARD EARTH FAULT
There are two standard earth fault elements, each with four independent stages. > The first element operates from measured quantities: > Earth fault current which is directly measured using a separate CT, or > Residual connection of the three line CTs > The second standard earth fault element operates from a residual current that is derived internally from the summation of the three phase currents. All earth fault elements have the same directionality and IDMT characteristics as the phase overcurrent element. Both earth fault elements may be enabled at the same time providing directional earth fault protection and back-up standby earth fault protection in the same device. The directionality of the earth fault elements is provided by either residual voltage or negative sequence voltage.
COLD LOAD PICK-UP LOGIC
Cold load pick-up temporarily raises the overcurrent settings following closure of the circuit breaker, allowing the protection settings to be set closer to the load profile.
RESTRICTED EARTH FAULT
The restricted earth fault protection provided for protection of transformer winding against earth faults may be configured as either high impedance or low impedance biased differential.
Choice of IDMT characteristics
IEC/UK curves TMS = 1
IEEE/US curves TD = 7
100 Operating time (s)
REF biased differential characteristics
10 Operating time (s) UK LTI IEC SI 1 IEEE MI IEEE VI US CO2 US CO8 IEEE EI 1 10 Current (Multiples of Is) 100 RECT IEC VI IEC EI 0.1 1 10 Current (Multiples of Is) 100
Operate K2 Restrain
K1 0% to 20% K2 0% to 150%
I s1 I s2
0.08 to 1. 0I n 0.10 to 1. 5I n
Features carefully designed to protect any type of system
VOLTAGE CONTROLLED OVERCURRENT
Voltage controlled overcurrent provides back-up protection for remote phase faults whilst remaining insensitive to load.
Two independent definite time stages of over frequency and four of under frequency are provided. The time delayed rate of change of frequency element provided, can be used to accelerate load shedding during severe system disturbances.
NEGATIVE SEQUENCE OVERCURRENT
Negative sequence overcurrent protection can be set as either non-directional or directional (forward/reverse), and can operate for remote phase-phase and phase earth faults even with delta-star transformers present.
The broken conductor protection detects unbalanced conditions caused by broken conductors, maloperation of single phase of switchgear or by single phasing conditions. It operates on the ratio of I2 to I1.
RMS THERMAL OVERLOAD
Thermal overload protection provides both alarm and trip stages. The thermal element may be set with either a single time constant characteristic for the protection of cables or dry transformers, or a dual time constant characteristic to protect oil filled transformers. In the event of loss of auxiliary supply, the thermal state is stored in non-volatile memory.
VOLTAGE TRANSFORMER SUPERVISION
Voltage transformer supervision is provided to detect loss of one, two or three VT signals, providing indication and inhibition of voltage dependent protection elements. An optically isolated input may also be configured to initiate the voltage transformer supervision alarm and blocking when used with MCBs or other external forms of voltage transformer supervision.
Under/over voltage protection may be configured to operate from either phase-phase or phase-neutral quantities. Two independent stages with definite time elements are available, one of the stages can also be configured to an inverse characteristic.
CURRENT TRANSFORMER SUPERVISION
Current transformer supervision is provided to detect loss of phase CT signals and inhibit the operation of current dependent protection elements.
Residual overvoltage protection is available for detecting earth faults in high impedance earthed or isolated systems. The neutral voltage is derived from the three phase voltage inputs. Two independent measuring elements with definite time characteristics are available, one of the elements can also be configured to have an inverse characteristic.
PROGRAMMABLE SCHEME LOGIC
Programmable scheme logic allows the user to customize the protection and control functions. It is also used to programme the functionality of the optically isolated inputs, relay outputs and LED indications. The programmable scheme logic comprises of gate logic and general purpose timers. The gate logic includes OR, AND and majority gate functions, with the ability to invert the inputs and outputs, and provide feedback. The programmable scheme logic is configured using the graphical MiCOM S1 PC based support software.
Programmable scheme logic editor (MiCOM S1)
CIRCUIT BREAKER FAILURE PROTECTION
Two stage circuit breaker failure protection may be used for tripping upstream circuit breakers and re-tripping of the local circuit breaker if required. The circuit breaker failure logic may also be initiated externally from other protection devices if required.
The measurements provided, which may be viewed in primary or secondary values, can be accessed by the back-lit liquid crystal display, or the communications ports. A wide range of instantaneous and integrated parameters are available. The list includes measured signals like phase currents and voltages and computed signals like Power, frequency, energy, etc. Phase currents and phase to neutral voltages are available in true rms and fundamental quantities. Phase notation is user definable using the MiCOM S1 text editor.
CIRCUIT BREAKER CONTROL
Circuit breaker control is available from the front panel user interface, optically isolated inputs and remotely via the substation communications.
A fault location algorithm provides distance to fault in miles, kilometres, ohms or percentage of line length
AUTORECLOSE WITH CHECK SYNCHRONISING
The P142 and P143 provide three-pole multi-shot autoreclose. The user may select a single, two, three or four shot autoreclose cycle, with independently settable dead times and reclaim time. Autoreclose can be initiated from the internal protection elements or from external protection via an opto input. Advanced features include live line working and sequence coordination (co-ordination with downstream reclosing equipment). The P143 also includes check synchronisation.
Up to 512 time-tagged event records are stored in battery backed memory, and can be extracted using the communication ports or viewed on the front panel display.
The internal disturbance recorder has 8 analogue channels, 32 digital and 1 time channel. Approximately 50 records of 0.5 s duration can be stored. All channels and the trigger source are user configurable. Disturbance records can be extracted from the relay via the remote communications and saved in the COMTRADE format. These records may be examined using MiCOM S1 or any suitable software program.
MEASUREMENT AND RECORDING FACILITIES
The P14x series is capable of measuring and storing the values of a wide range of quantities. All events, fault and disturbance records are time tagged to a resolution of 1ms using an internal real time clock. An optional IRIG-B port is also provided for accurate time synchronization. A lithium battery provides backup for the real time clock and all records in the event of auxiliary supply failure. This battery is supervised and easily replaced from the front of the relay.
TRIP CIRCUIT SUPERVISION
Supervision of the trip circuit in both circuit breaker open and closed states can be realised using the optically isolated inputs and programmable scheme logic.
Disturbance record viewed in MiCOM S1
Records of the last 5 faults are stored in battery backed memory. The information provided in the fault record includes: > > > > > > > Indication of faulted phase Protection operation Active setting group Date and time Fault location Relay and CB operating time Currents, voltages and frequency
SECOND REAR COMMUNICATION PORT
An optional second rear courier port is available which may be configured as RS232, RS485 or K-Bus.
Automatic tests performed including power-on diagnostics and continuous self-monitoring ensure a high degree of reliability. The results of the self-test functions are stored in battery backed memory. Test features available on the user interface provide examination of input quantities, states of the digital inputs and relay outputs. A local monitor port provides digital outputs, selected from a prescribed list of signals, including the status of protection elements. These test signals can also be viewed using the communication ports and front panel user interface.
CIRCUIT BREAKER CONDITION MONITORING
The circuit breaker condition monitoring features include: > Monitoring the number of breaker trip operations > Recording the sum of the broken current quantity ΣIx, 1,0 ≤ x ≤ 2,0 > Monitoring the breaker operating time > Fault frequency counter
All models within the MiCOM P14x series include: > > > > > > > > > > > A back-lit liquid crystal display 12 LEDs (8 programmable) An optional IRIG-B port An RS232 port & an RS485 port An optional RS232/RS485/K-Bus port An optional ethernet port for UCA2 protocol A download/monitor port A battery (supervised) N/O and N/C watchdog contacts Supervised +48V field voltage 1A/5A dual rated CTs
LOCAL AND REMOTE COMMUNICATIONS
Two communication ports are available as standard; a rear port providing remote communications and a front port providing local communications. The front RS232 port has been designed for use with MiCOM S1, which fully supports functions within the relay by providing the ability to programme the settings off-line, configure the programmable scheme logic, extract and view event, disturbance and fault records, view the measurement information dynamically and perform control functions. The default remote communications are based on RS485 voltage levels. Any of the protocols listed below can be chosen at the time of ordering. > > > > > Courier / K-bus Modbus IEC60870-5-103 (optic interface also available) DNP 3.0 UCA2 (over ethernet)
Expansion cards are available to increase the number of digital inputs and outputs for the P142 and P143 The optically isolated inputs are independent and may be powered from the +48V field voltage. The relay outputs may be configured as latching or self reset. All CT connections have integral shorting.
COMM1 SCADA / substation control interface HMI Full access to all settings, signals and measurands
Different communication interfaces of P14x
COMM2 Remote access by protection engineer
PC Local access by protection engineer
P14x provides up-to-date versatile communication options.
AREVA DEVICE TRACK RECORD
>> KCGG/KCEG - First numerical overcurrent relay launched 1993
and sold over 20 000 units..
>> MODN launched in 1998 with over 2000 units delivered >> P14x MiCOM series introduced in 1999.
Worldwide application, with over 10000 units delivered.
>> Introduction of phase II hardware of MiCOM P14x in 2002. >> Addition of UCA2 protocol and ethernet port in 2004
AREVA T&D Worldwide Contact Centre: http://www.areva-td.com/contactcentre/ Tel.: +44 (0) 1785 250 070
Our policy is one of continuous development. Accordingly the design of our products may change at any time. Whilst every effort is made to produce up to date literature, this brochure should only be regarded as a guide and is intended for information purposes only. Its contents do not constitute an offer for sale or advise on the application of any product referred to in it. We cannot be held responsible for any reliance on any decisions taken on its contents without specific advice.
AUTOMATION-L3-P14x-BR-07.05-0933b-GB - ? - AREVA - 2004. AREVA, the AREVA logo and any alternative version thereof are trademarks and service marks of AREVA. MiCOM is a registered trademark of AREVA. All trade names or trademarks mentioned herein whether registered or not, are the property of their owners. - 389191982 RCS PARIS - PDF ONLY - SONOVISION-ITEP