T2200 Datasheet, PDF (1/2 Pages) Littelfuse – The T2200 detects the highest

T2200 3 Phase Overcurrent Relay
• Protection of generators against
overcurrent
• Visual indication of power, pick-up and
relay tripping
• High precision digital countdown timer
for delayed output
• Accepts high supply voltage variations:
60 - 110%
• Cost effective and highly reliable
compact design
• 50 hours burn-in before final test
• Operating temperature range:
-20°C to +70°C
• Certified by major marine ­
classification societies
• Flame retardant enclosure
• DIN rail or screw mounting
Application
The T2200 3 Phase Overcurrent Relay
has a broad application where all 3 phas-
es or any single phase current
detection will function for protection,
control and monitoring.
The T2200 is part of the SELCO T-Line
series with modular units for protection,
control and monitoring of generators,
both in marine and land-based applica­
tions. The T2200 is type approved by
major marine classification societies.
Function
The T2200 detects the highest of the 3
input currents and, if this exceeds the
preset level (0.5 - 1.4 x I_N), the pick-up
LED will indicate and the delay timer
will be started.
Installation
The supply voltage is connected to
terminals 1 and 3 or terminals 2 and 3,
according to the supply source.
The T2200 is connected to the
measuring current coming from the
current transducers secondary via
terminals 11-12, 13-14 and 15-16.
See connection diagram.
The current setting can be calculated
according to the following example:
Overcurrent protection of a generator.
Required trip level: 110%
Generator rating: 695A
Current transformer: 800/5A
Setting: 110 x 695/800 = 96% = 0.96 x I_N
Troubleshooting
1) If the relay is not operating please
check that the power LED is on,
ensuring that the supply is present.
2) Measure the supply voltage which
must be compatible with the
information label on top of the
enclosure.
3) Measure the current levels in
terminals 11-12, 13-14 and 15-16 and
check that at least one of the currents
is above setting.
For example:
0.5 x I_N = 2.5A; 1 x I_N = 5A
After the preset time (3 - 30 sec.) has
expired, the output relay and the
corresponding LED will be activated,
provided that the current level was
exceeded for the entire delay time.
The T2200 can be provided with an extra
output relay. See connection diagram.
The T2200 can also be provided with a
latching output relay. The latching can be
reset or disabled by bridging terminals 5
and 6. On units with two output relays,
reset is done by disconnecting the
power supply.
Connection diagram. The dotted lines illustrate connection possibilities on units with an extra output relay.