Protection Relays & Controls
Generator & Single-Function Protection–3-Phase Short-Circuit
T2300 SERIES
3-Phase Short-Circuit Relay
Description
The T2300 3 Phase Short-Circuit Relay is designed for
protection of generators, power transmissions and
consumer’s supply against short circuit. The T2300 reacts on
a definite delay versus current level.
The T2300 detects the highest of the 3 input currents and,
if this exceeds the preset level (1.0 - 4.0 x I
N
), the pick-up
LED will indicate and the delay timer will be started. After
the preset time (0.1-1.0 sec.) has expired, the normally
energized output relay will de-energize and the relay LED will
be activated, provided that the current level was exceeded
for the entire delay time. The T2300 has a normally energized
output relay.
Simplified Circuit Diagram
Features & Benefits
U
1
2 SUPPLY
3
11
12
13
14
15
16
10
9
8
7
6
5
FEATURES
Accepts high supply
voltage variation
Visual indication of
power, pick-up, and
output trip
Direct line-line or line-
neutral voltage supply
(up to 690 Vac)
Built-in capacitor
cack-up supply
Galvanic isolated inputs
DIN-rail or screw-mount
& adjustment by
potentiometers
FUNCTION
BENEFITS
Ensures correct operation in spite of voltage
supply fluctuations (fulfills marine class
requirement)
Provides quick and concise status information
Simplifies design and installation.
No need for PTs.
Ensures correct operation in spite of drop in
the supply voltage
Protects the unit against high AC voltage and
currents from the installation including spikes
Easy installation
I
1
I
2
I
3
SHORT CIRCUIT
T2300
(3-Phase Short-Circuit Relay)
L1 L2 L3
Ordering Information
ORDERING
NUMBER
TERMINALS
1-3
2-3
I
N
Specifications
Trip Level
Delay
Max. Voltage
Voltage Range
Consumption
1.0-4.0 x I
N
0.1-1.0 sec.
660 V
60-110%
Voltage 5 VA at U
N
Current 0.3 VA at I
N
Continuous Current
2 x I
N
Frequency Range
45-400 Hz
Output Relay
Normally de-energized, latching, resetable
Contact Rating
AC: 400 V, 5 A, 2000 VA
DC: 150 V, 5 A, 150 W
Overall Accuracy
±5%
Repeatability
±1%
Operating Temperature
–20°C to + 70°C
Dielectric Test
2500 V, 50 Hz
EMC
CE according to EN50081-1, EN50082-1,
EN50081-2, EN50082-2
Approvals
Certified by major marine classification societies
Burn-in
50 hours before final test
Enclosure Material
Polycarbonate. Flame retardant
Weight
0.5 kg
Dimensions
H
70 mm (2.76”);
W
100 mm (3.94”);
D
115 mm (4.52”)
Installation
35 mm DIN rail or 4 mm (
3
/
16
”) screws
Rev 4-B-111014
T2300.0100
T2300.0020
T2300.0030
T2300.0040
T2300.0050
T2300.0060
T2300.0070
230 V
450 V
24 Vdc
24 Vdc
450 V
480 V
230 V
5A
400 V 5 A
5A
1A
400 V 5 A Normally de-energized output
415 V 5 A
1A
Other supply voltages and combinations are available on request.
© 2014 Littelfuse Protection Relays & Controls
Littelfuse.com/t2300
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