Use : Feeder protection KEPCO / IEC standards, two types available.

- Overcurrent Protection Function (50/51, 50N/51N)
   KEPCO and IEC standard Characteristic Curve

- Reclosing Function(79)

- Unbalance Alarm Function(UBOC)

- OLTC Blocking Function(50(OLTC))

- Monitoring and Control Function

- Self Diagnosis Function

- Fault and Event Data Record

Product

The product operates by over current which occurs during power system faults and it is added reclosing function &load unbalance detection function with 50/51 relay. It is designed to fit with protection, supervision, control & measurement in the distribution line.

Features

1. Overcurrent Protection    Function (50/51, 50N/51N)	- Adopt characteristic curve according to KEPCO and IEC standard
2. Reclosing Function(79)	- Operating up to 3 times - After setting one time reclosing by internal manu, it can block    instantaneous trip - After finishing of reclosing, Instantaneous trip will return automatically
3. OLTC BLOCKING 기능    (UBOC)
4. OLTC Blocking     Function(50(OLTC))	- Send blocking signal to stop operating on load tap changer during    reclosing(79) operates
5. Monitoring and Control     Function	- Monitoring of contacts status in circuit breaker - Remote control of contacts status in circuit breaker
6. Self Diagnosis Function	- Setting value, Memory(ROM/RAM/Clock), Power source, A/D converter,    In-output circuits
7. Fault and Event Data     Record	- Event data(up to 256ea) and Fault data(up to 16ea) record - Change setting values and analyze fault data though HMI which is offered    by manufacturer - Possible to change to comtrade file

Main functions

1. Protection metering function

- Overcurrent metering (50/51)

- Recloser function (79)

- Reverse overcurrent metering (46)

2. Metering function

- Each phase current (A)

3. Communication function

- Front: RS232C, Rear: RS485

Specification

Control Power Source		DC 90 ~ 140V, 60Hz
Rated	Current	AC 5A
Input Contact	Current	4ea (A, B, C, N-phase current)
	Digital	5ea(CB-b, Trip Blocking, Manual Lock, 43RC, Reset)
Output Contact	Control	5ea('a' contact×4ea, '1a1b' contact×1ea)
	Alarm	9ea('2a' contact×8ea, '2b' contact×1ea)
Communication	Front	RS-232C
	Rear	RS-485 (Option)
Outer Case	Structure	Draw Out Type
	Material	Steel
	Size	172 x 226 x 221 mm