AUMSHIVAY ENGINEERING PRIVATE LIMITED
B-21, Bhan Nagar, Queens Road, Jaipur-302021
Website: www.aumshivay.com, www.omengineering.in
E-mail:[email protected]
PAGE. 13
REG. OFFICE:VILLA NO. 60,LATA NAGAR, KALWAR ROAD, JHOTWARA, JAIPUR - 302012
TM
TM
TRANSFORMER RELAY
Transformer Differntial Relay (MD32TM);
These are
three-phase percentage biased differential protection relay
for 2 winding transformers or 3 winding with only one source of supply. The relay measures the incoming currents and operates
the CT ratio and Power Transformer vector group compensation without the need of using interposing CTs.
TRANSFORMER DIFFERNTIAL RELAY (MD32TM)
Item
Transformer Differential Relay (MD32-TM)
Make
L&T
Model
MD32-TM
Real Time
Measurements
IdA-IdB-IdC-Ido - I1A-I1B-I1C - I2A-I2B-I2C - IdIIA-IdIIB-
IdIIC - IdVA-IdVB-IdVC
Maximum Demand
and Inrush Recording
IdA-IdB-IdC-Ido - I1A-I1B-I1C - I2A-I2B-I2C - IdIIA-IdIIB-
IdIIC - IdVA-IdVB-IdVC
Programmable Input
Quantities
Fn
= System frequency : (50 - 60)Hz
1In
= Rated primary current of phase CTs HV side : (1 - 9999)
A, step 1A
2In
= Rated primary current of phase CTs LV side : (1 - 9999)
A, step 1A
1V
= Rated primary voltage of Transformer HV side : (0.2 -
380)kV, step 0.01kV
2V
= Rated primary voltage of Transformer LV side : (0.2 -
380)kV, step 0.01kV
a
= Selection of Transformer's vector group.
F87T : Low-set Phase
Differential
Current setting range :
d>
=
(0.1 - 0.5)In, step 0.01In
Instantaneous output :
£ 0.03s
Bias percentage :
R = (10 - 50)%
, step 1%
2 Harmonic restraint level :
2H = (0.1 - 0.3)Id
, step 0.01Id
5 Harmonic restraint level :
5H = (0.2 - 0.4)Id
, step 0.01Id
Time during which harmonic restraint level can be lowered at
transformer energisation:
tH = (0.05 - 90)s,
step 0.01s
2 Harmonic restraint level reduction during tH :
R2H = (0.5 -
1)2H,
step 0.01
5 Harmonic restraint level reduction during tH :
R5H = (0.5 -
1)5H
, step 0.01
