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ENVIRONMENTAL FEATURES
The relay must be installed in a room with the following
features:
- indoor,
- dry, not dusty and not corrosive atmosphere.
CONSTRUCTION
In compliance with VDE, UL, CEI standards.
DIGITAL INPUT
Type:
Dry contacts
Output:
24 Vdc, 10 mA (stabilized)
COMMUNICATION
Type:
1 4-wire RS232 port + 2 2-wire RS485
ports, Full duplex, 1200÷19200 baud
Protocol:
Modbus RTU
Functions:
Reading/Writing of setpoints
Reading of actual values
Executing of commands
FRAME
Auto-extinguishing ABS with frontal in polycarbonate (IP54).
DIMENSION
144 x 144 x 141 mm (→ Fig. 2.1 – IPR-D overall dimensions)
WEIGHT
1.5 Kg
GROUND CT INPUT
Secondary rated current: CT: 1 A or 5 A (specify with order).
Sampling:
True RMS at 16 samples per
cycle.
Bandwidth:
0÷100 Hz
CT burden:
0.25 VA at rated secondary
current.
Continuous:
10 A
Current withstand capacity:
INVERSE-TIME GROUND OVERCURRENT
(51G/51N)
Pickup level:
4÷300% CT, Steps: 1%
Time multiplier:
0.1÷20.0; Steps: 0.1
Dropout level:
Time
current level drops below the pickup
level.
Current accuracy:
± 3% of the setting.
Time accuracy:
included in ± 3% or in ±20 ms, per
>150% of the set value.
CURRENT PROTECTION RELAY - IPR-D
100 A per 1 s
resets
to
zero
whenever
OUTPUT CONTACT
Load:
resistive (p.f.= 1)
inductive (p.f.= 0.4; L/R = 7 ms)
Rated load:
250 Vac, 8 A or 30 Vcc, 8 A with p.f.=1
250 Vac, 5 A or 30 Vcc, 5 A with p.f.=0.4
Max. operating Voltage: 250 Vac, 125 Vcc
Max. operating Current: 8 A
Capacity:
2000 VA, 240 W with p.f.=1
1250 VA, 150 W with p.f.=0.4
LED INDICATORS
Relay status:
Trip, Alarm, Service
System status:
Closed circuit breaker, open circuit
breaker, earthed circuit breaker and
reaching of:
Pickup level I
Pickup level I
Display (LCD):
16 x 2 digits
Display accuracy:
Load current:
TERMINAL BLOCK
Fixed, for cables with section: 4 mm
MOUNTING
The relay has to be jointed to the structure fixing it by stirrup
with screws.
FRONT PANEL CUT-OUT
137 x 137 mm
APPLICABILITY
System:
Frequency:
Current:
Voltage:
OVERCURRENT CURVES
Selection of ground curves according to ANSI, IAC or IEC.
•
Moderately inverse
•
Normally inverse
•
Extremely inverse
•
Definite time
The curves are valid up to 18 times the CT rated current
GROUND INSTANTANEOUS OVERCURRENT
(50G/50N)
Pickup level:
Current accuracy:
Time accuracy:
Saturation:
1.4
Chapter 1: General information
> (51N/G)
0
>> (50N/G)
0
±1% @ 100% CT
2
(12 AWG).
three-phase;
50 and 60 Hz;
max. 5000 A;
max. 69 kV
4÷1800% of CT, Steps: 10%
± 3% of the set value.
35 ms max. per > 150% of the set
pickup level.
18 times the CT rated current.
Manual P/N: IPR-D GBM 01/09/2006
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