Littelfuse T3200 User Manual

T3200 Insulation Monitoring Relay

SYS. 1
SYS. 2

13
15
11

T3200

3

2

1

10

+

-

20

INS. 2

18

COM.

19

INS. 1

SYS.

2

SYS.

1

7

9

8

6

5

3

L

L
L

2

1

E2323

Double Insulation Monitoring Relay

• Price competitive due to the
combined functions

• Visual indication of power, pick-up
and relay tripping on both relays

• High precision digital countdown
timer for delayed output

• 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 T3200 Insulation Monitoring Relay
is intended for continuous insulation
monitoring on three-phased insulated
networks on board ships.

The T3200 continuously monitors two
systems, galvanically separated from
each other, e.g. the busbar and the
lighting system, or two busbar systems.

The unit features two output relays for
alarm purposes and two analog outputs
for instrument reading. Instruments are
available from SELCO as standard sized
switchboard instruments.

Function

For each insulation system (I and II) the
electronic measuring circuit will
compare the measured insulation value
to the preset value of the relay. An
insulation drop to a value lower than the
preset value will cause activation of the
corresponding output relay
resulting in alarm signals to be obtained
between terminals 6 and 7 or 9 and 10
(system I or system II respectively).

Consequently, the output relays will be
deactivated when the insulation values
are satisfactory, while insulation values
lower than the preset value will cause
activation of the output relays. This
means that power supply interruptions
will not result in alarm signals as the
output relays normally are deactivated.

The alarm signal can be delayed by
means of a presetting function on the

front of the unit. In this way only
continuous earth faults will cause alarm
signals.

The instrument output has been
adapted for connection of a
megaohmmeter which indicates the
actual insulation level, either by means
of two instruments simultaneously
indicating for both insulation systems (I
and II), or by means of one instrument
which can be connected to the two
instrument outputs via a change-over
switch. See connection diagram.

NOTE: The T3200 operates only on AC
installations. Insulation faults in
connection with thyristor controls and
other semiconductor devices can cause
errors in measurements.

Connection Diagram.

Installation

The measuring circuits for the two
insulation systems I and II are
connected to the network as shown on
the connection diagram.

The supply voltage is connected to
terminals 1-3 or 2-3 according to the
supply source.

Dimensions.

7

0

115

5

0

85

7.5

1

0

100

Fixing holes

2 x ø 4.5 mm

Dimensions in mm

Type Approvals and Certificates

The T3200 has been designed and tested
for use in harsh environments. The unit
is based on standard components,
providing long term durability.
The T3200 carries the CE label and has
been approved by the following marine
classification societies:

Bureau Veritas

Polish Register of Shipping

Romanian Register of Shipping

Russian Maritime Register of Shipping

Specifications

T3200 Insulation Monitoring Relay

Insulation level 0 - 5MW
Delay 1 - 10 sec.
Max. voltage 660V
Voltage range 80 - 110%
Consumption Max. 2VA
Frequency range 45 - 65Hz
Measuring voltage 15V DC
Internal resistance 200kW
Instrument output 0 - 1mA
Instrument resistance Max. 100W
Output relays Normally de-energized
Contact ratings AC: 400V, 2A, 250VA

DC: 110V, 2A, 100W

Overall accuracy ±5% of preset value
Operating temperature -20°C to +70°C
Dielectric test 2500V, 50Hz
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 0.5kg
Dimensions 70 x 100 x 115mm (H x W x D)
Installation 35mm DIN rail or 4mm (3/16”) screws

The specifications are subject to change without notice.

Type Selection Table

Terminals
Type 1-3 2-3 Function
T3200.0010 230V
T3200.0020 450V 400V
T3200.0030 480V 415V
T3200.0040 24V DC With 24V DC/DC converter
T3200.0050 110V 100V
T3200.0060 127V 120V

Other voltages are available on request.

Main office:
SELCO A/S

Betonvej 10
DK-4000 Roskilde
Denmark
Phone: + 45 7026 1122
Fax: + 45 7026 2522
e-mail: [e-mail]
www.selco.com

Accessories

Dimensions Weight
E2323.0010 Megaohmmeter 96x96mm 0.5kg
E2324.0010 Kiloohmmeter 96x96mm 0.5kg
E2333.0010 Megaohmmeter 144x144mm 0.8kg

T3295-62E