Features

Up to 20 binary inputs and 14 binary relay outputs including 6 VT inputs for voltage sensing or external PTs and 4 CT inputs

● Communication protocols: DNP3, IEC 60870-5-101, IEC60870-5-104, Modbus, IEC 61850

● PPP communication protocol for fast protection, transfer switch, fault isolation and power recovery

● Local and remote HMI

● Customizable and flexible selections of protection schemes

● Programmed integrated circuit control

● Automatic fault detection isolation and restoration

● Self-diagnose function

● Definable selection modes for resloser and sectionaliser control

● Embedded In-rush detection

Recloser Protection Scheme

Protection Functions

Current Protection

− Overcurrent protection [[51P, 50P-1, 50P-2,50P-3]

− Overcurrent ground-fault protection [51N, 50N-1, 50N-2, 50N-3]

− Sensitive earth-fault protection [50SEF;]

− Negative sequence overcurrent protection [46-1, 46-2]

− Phase discontinuity protection [46PD]

− Three-phase inrush detector [INR]

Control

− Autoreclosing [79;]

− Synchro-check/voltage check [25]

− Circuit breaker [52]

− Loop control

Supervision Monitoring

− CB condition monitoring [52CM]

Directional Protection

− Single-phase overcurrent protection [67/51P-1, 67/51P-2]

− Ground-fault protection [67/51N-1, 67/51N-2;]

Voltage Protection

− Three-phase overvoltage [59-1, 59-2, 59-3]

− Three-phase undervoltage [27-1, 27-2, 27-3]

− Positive sequence overvoltage [59PS-1, 59PS-2]

− Negative sequence overvoltage [47-1, 47-2]

− Zero sequence overvoltage [59N-1, 59N-2]

Measurement

− Three-phase current [IA, IB, IC]

− Sequence current [I1, I2, I0]

− Ground current [IG]

− Three-phase voltage, source [VA, VB, VC]

− Three-phase voltage, load [VA, VB, VC(2)]

− Sequence voltages, source [V1, V2, V0]

− Sequence voltages, load [V1, V2, V0(2)]

− Three and single -phase power and energy [P, E]

− Frequency [f]

− Power factor [pf]

Frequency Protection

− Underfrequency, overfrequency, frequency rate of change[81-1, 81-2]

− Load shed & restoration [81S-1, 81S-2]

Recorders

− Digital fault recorder

− Sequence of events

− Fault recorder

− Fault locator

Local HMI

● Low-power 32-bit microprocessor, military grade components for maximum durability under extreme conditions

● Monitoring and controlling functions, it can measure line voltage, current, active power, reactive power, apparent power, frequency and other electrical parameters

● Large capacity FLASH memory to record historical data

12864LCD display could show 4 lines of 20 characters, to interact between human and computer

● Physical switch for changing from reclosing controller to sectionaliser controller

● Maximum 20 programmable alarm LEDs to indicate the switch status and alarm faults

● Maximum 10 programmable buttons

Communications

● Via RJ-45 Ethernet communication connector

● Serial communication using RS-232, RS-485

● Support ‘IEC60870-5-104: 2006, IDT’ and ‘IEC60870-5-101: 2002, IDT’ statute

● Support MODBUS RTU / ASCII serial and TCP/IP model

Input and output ports

● Fully configurable 20 binary inputs 8 binary relay outputs

● 16 analog sampling channels

Optional Accessories

SMS Module (GSM) and remote control functions:

· SMS module: communicate with the master controller via RS485

· Hand-hold remote controller functions:

A simple hand-on remote control is available for

opening and closing operations within 10 meters range.

WIFI communication modules: communicate with the master controller via RS485

Operating through a computer or a cell phone APP, support queries of controller status, valuation, protection records and other information.The controller could be set the opening and closing operations and other functions.