Littelfuse T3300 Series - Manual

Protection Relays & Controls
© 2013 Littelfuse Protection Relays & Controls
Features & Benefits
Littelfuse.com/t3300
Generator & Single-Function Protection–Voltage
T3300 SerieS
3-Phase Voltage Relay
Description
The T3300 Voltage Relay is designed for voltage monitoring
on generators, bus bars or other distribution systems. The
T3300 will signal when the voltage is under or over the
limits for a preset time period.
The T3300 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
N
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 1.2 kg
Dimensions H 70 mm (2.76”); W 150 mm (5.9”); D 115 mm (4.52”)
Installation 35 mm DIN rail or 4 mm ( 3 / 16 ”) screws
Ordering Information
Simplified Circuit Diagram
Other voltages are available on request.
Features & Benefits
OrderinG number
TerminalS
17-19
21-23
25-27
18-19
22-23
26-27
T3300.0010 230 V
T3300.0020 450 V 400 V
T3300.0030 110 V 100 V
T3300.0040 480 V 415 V
16
15
14
12
11
10
OVERVOLTAGE
ALARM
(Inputs are isolated)
UNDERVOLTAGE
ALARM
PHASE
1
PHASE
2
PHASE
3
22
23
21
26
27
25
18
19
17
T3300
(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. 3-phase monitoring of both
undervoltage and overvoltage in same unit,
and occupying 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