ABB REF615 E User Manual

GUID-B55D0F5F-9265-4D9A-A7C0-E274AA3A6BB1 V1 EN
Figure 458: Inverse curve B characteristic of undervoltage protection
11.3.2.2 User-programmable inverse-time characteristics for undervoltage
protection
The user can define curves by entering parameters into the standard formula:
1YHT530004D05 D Section 11
General function block features
615 series 837
Technical Manual

ABB REF615 E Specifications

General

Type	Feeder Protection Relay
Rated Frequency	50/60 Hz
Operating Temperature Range	-25°C to +55°C
Frequency Range	45-65 Hz
Communication Protocols	IEC 61850, Modbus, DNP3
Mounting	Flush mounting
Protection Functions	Overcurrent, Earth fault
Input Voltage	24-250 V DC
Enclosure	IP54
Weight	2.5 kg