Littelfuse T2100 User Manual
Protection Relays & Controls
9
5
C/B TRIP
10
6
L - L SUPPLY
7
8
1
3
2
RESET
13
14
LOAD
1
2
3
LL L
T2100
(Excitation
Loss
Relay)
G
9
5
C/B TRIP
10
6
L - N SUPPLY
7
8
1
3
2
RESET
13
14
LOAD
1
2
3
LL L
T2100
(Excitation
Loss
Relay)
G
Generator & Single-Function Protection–Excitation Loss
T2100 SERIES
Excitation Loss Relay
Simplified Circuit Diagram
Description
The T2100 Excitation Loss Relay protects against loss of
excitation in a synchronous generator. T2100 detects the
high-inductive current running into a generator in case of
low excitation. The faulty generator breaker is tripped, thus
protecting the generator, and avoiding undervoltage on the
busbar with a possible blackout of the system.
The T2100 calculates I x sin φ, representing the reactive
power. If the reactive power becomes negative and exceeds
the preset level (0.5-1.5 x I
and the delay timer will be started. After the preset time
), the pickup LED will indicate
N
(2-20 sec.) has expired, the output relay and LED will be
activated, provided that the negative reactive power level
was exceeded for the entire delay time.
Features & Benefits
FEATURES BENEFITS
Accepts high supply
voltage variation
Visual indication of
power, pick-up, and
output trip
Direct line-line or lineneutral voltage supply
(up to 690 Vac)
Available with separate
24 Vdc supply
Galvanic isolated inputs
DIN-rail or screw-mount
& adjustment by
potentiometers
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.
Safe operation. Maintains protection
regardless of system voltage failure
Protects the unit against high AC voltage and
currents from the installation including spikes
Easy installation
Ordering Information
ORDERING
NUMBER
T2100.0010 230 V 5 A L-N
T2100.0020 480 V 415 V 5 A L-L
T2100.0030 450 V 400 V 5 A L-L
T2100.0040 110 V 100 V 1 A L-L
T2100.0050 110 V 100 V 5 A L-L
T2100.0060 110 V 100 V 5 A L-L Current 0.2-1.2 x I
T2100.0070 480 V 415 V 5 A L-L
T2100.0080 110 V 100 V 5 A L-L
Other supply voltages and combinations are available on request.
© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/t2100
TERMINALS
1-3 2-3
I
SUPPLY FUNCTION
N
Normally energized output,
current 0.05 -0.15 x I
24 V DC aux. voltage
supply, current 0.2 1.2 x I
Specifications
Trip Level 0.5-1.5 x I
Delay 2-20 sec.
Max. Voltage 660 V
Voltage Range 50-110%
Consumption Voltage 5 VA at U
Current 0.3 VA at I
Continuous Current 2 x I
Frequency Range 45- 400 Hz
Output Relay Normally de-energized, latching, resetable
Contact Rating AC: 400 V, 5 A, 1250 VA
DC: 150 V, 5 A, 120 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
N
Approvals Certified by major marine classification societies
Burn-in 50 hours before final test
Enclosure Material Polycarbonate. Flame retardant
N
Weight 0.5 kg
Dimensions H 70 mm (2.76”); W 100 mm (3.94”);
D 115 mm (4.52”)
N
Installation 35 mm DIN rail or 4 mm (
N
N
N
N
3
/16”) screws
Rev: 4-A-050213
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