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Protection Relays & Controls

Littelfuse.com/t3100

Generator & Single-Function Protection–Voltage

T3100 SERIES

Voltage Relay

Description

The T3100 Voltage Relay is designed for voltage monitoring

on generators, bus bars or other distribution systems. The

T3100 will signal when the voltage is out of limits for a preset

time period.

The T3100 consists of two circuits, one circuit for

overvoltage and one for undervoltage monitoring.

Each circuit has individual settings for voltage levels and

time delays.

Speciﬁcations

Overvoltage Level 100-120%

Delay 1-10 sec.

Hysteresis 1-10%

Undervoltage Level 80-100%

Delay 1-10 sec.

Hysteresis 1-10 %

Max. Voltage 660 V

Voltage Range 70-120%

Consumption

5 VA at U

Frequency Range 40-400 Hz

Overvoltage Relay Normally de-energized

Undervoltage Relay Normally energized

Contact Rating AC: 250 V, 2 A, 250 VA

DC: 60 V, 2 A, 100 W

Overall Accuracy ±3% of highest value

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 (

/16”) screws

Ordering Information

Simpliﬁed Circuit Diagram

Other voltages are available on request.

Features & Beneﬁts

ORDERING NUMBER

TERMINALS

1-3 2-3

T3100.0010 230 V

T3100.0020 450 V 400 V

T3100.0030 110 V 100 V

T3100.0040 480 V 415 V

T3100.0060 127 V 120 V

(L)

(N)

OVERVOLTAGE

ALARM

UNDERVOLTAGE

ALARM

T3100

(Voltage Relay)

FEATURES BENEFITS

Accepts high supply

voltage variation

Ensures correct operation in spite of voltage

supply ﬂuctuations (fulﬁlls marine class

requirement)

Visual indication of power,

pick-up, and output trip

Provides quick and concise status information

Direct line-line or line-

neutral voltage supply (up

to 690 Vac)

Simpliﬁes design and installation.

No need for PTs.

Combining 2 relays in

same enclosure

Economic solution. Monitoring both

undervoltage and overvoltage in same unit,

and ccupying less space in the switch panel

Galvanic isolated inputs

Protects the unit against high AC voltage and

currents from the installation including spikes

DIN-rail or screw-mount

& adjustment by

potentiometers

Easy installation

Rev: 4-A-050213

T3100 SERIES 1

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Littelfuse T3100 Series Instrukcja Użytkownika

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