AUMSHIVAY ENGINEERING PRIVATE LIMITED
B-21, Bhan Nagar, Queens Road, Jaipur-302021
Website: www.aumshivay.com, www.omengineering.in
E-mail:[email protected]
PAGE. 6
REG. OFFICE:VILLA NO. 60,LATA NAGAR, KALWAR ROAD, JHOTWARA, JAIPUR - 302012
TM
TM
Generator Protection Relay (SC14S);
Relay SC14S is a self-powered, single-phase, non-directional, Earth fault
relay with one measuring element. The relay can be used for differential protection of generators, REF applications of generators
and transformers in all low voltage, medium voltage and high voltage sub-stations. The relay’s solid-state design offers seven
fields selectable pick up current settings. There are two time delay options in addition to instantaneous trip–100 millisecond and
200 millisecond. The relay has a built in third harmonic filter to avoid spurious tripping in harmonic rich power systems.
TECHNICAL SPECIFICATIONS
Relay Ratings
Nominal Current (In):
1A or 5A
Frequency:
50Hz ± 2.5 Hz
Auxiliary Power Supply
Self powered
Relay Settings:
Current (Is): One of the two ranges (factory set),
10% to 40% of In in steps of 5% or
20% to 80% of In in steps of 10%
CT Burden
Less than 1.0 VA at Is min
Less than 6 VA at Is max
Operating Characteristics
Front panel programmable, using push buttons.
Pick up current:
Same as set current
Is
Operating time:
Field selectable
Instantaneous (Typical 25 ms @ 3 Is) or
100 msec, 200 msec ( at 3 Is)
Accuracy
As per Error class 5 of IS 3231: 1987
Over Load capacity
20 times set current Is for 3 sec
Operation Indicators
LED indication
Flag indication (manual reset)
Output Relay Contacts
2 C/O contacts for trip signal (self reset)
Output contact rating
Rated voltage:
250 V AC / 30 V DC
Rated current:
5A
Rated Breaking Capacity:
2000VA / 240 W (Resistive)
Electrical performance:
Please refer separate document
Specifications
“ General Electrical Characteristics”
Case
Draw out case
Front Bezel:
158 x 71 mm
Panel Cutout:
142 x 62 mm
Depth:
224 mm
Weight
1.0 kg approx.
GENERATOR PROTECTION RELAY (SC14S)
Description
INSTANTANEOUS EARTH FAULT RELAY
Make
L&T
Model
SC14S
Specifications
1 phase, non-directional, Earth fault relay with one
measuring element.
Applications
The relay can be used for differential protection of
generators, REF applications of generators and
transformers in all low voltage, medium voltage sub-
stations.
