Delta MCS-1800 Specifications download pdf (Page 49)

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ORDERING INFORMATION

MOTORSAVER™ THREE-PHASE VOLTAGE MONITOR

355 SERIES

Supply Watts 6W maximum

Frequency 50*/60 Hz

Contact Rating SPDT, pilot duty 470 VA @ 600

VAC (400 or 600V range) General-

purpose 10A @ 240 VAC (200V

range) 1hp @ 240 VAC (200V range)

Transient Protection 2500V for 10 ms

Line Voltage Monitored 190-240, 380-480, or 575-600 VAC

Low Voltage Trip 90% of setpoint (±1%)

Low Voltage Reset 93% of setpoint (±1%)

Reset Delay Time after Fault

Manual or 2-300 seconds

Reset Delay Time after Power Loss

Manual or 2-300 seconds

Trip Delay Time High Voltage

2-30 seconds, adjustable

Trip Delay Time Low Voltage

2-30 seconds, adjustable

Trip Delay Time Phase Fault

0.5 seconds

Trip Delay Time Unbalance

2-30 seconds, adjustable

Voltage Unbalance Reset

Trip setting minus 1%

Voltage Unbalance Trip 2% to 8%, adjustable

Dimensions 2.9”H x 5.25”W x 2.9”D

(7.4 x 13.3 x 7.4 cm)

Weight 1.0 lb (0.45 kg)

Approvals UL and cUL listed, File #E68520

Warranty 5 years

DESCRIPTION

The MotorSaver™ 355 Series Three-Phase Voltage

Monitors are designed to protect three-phase motors

regardless of size. The 355-200 model monitors 190-240

VAC input voltages, the 355-400 model monitors 380-480

VAC input voltages, and the 355-600 model monitors 575-

600 VAC input voltages. The unique microprocessor-based

voltage and phase-sensing circuit constantly monitors the

three-phase voltages to detect harmful power line conditions,

including single phasing, low-voltage, phase reversal, voltage

unbalance, and high voltage. When a harmful condition

is detected, the 355 Series output relays are deactivated

after an adjustable trip-delay time period. The output relay

reactivates after power line conditions return to an acceptable

level for an adjustable restart delay time. The trip and reset

delays prevent nuisance tripping due to rapidly ﬂuctuating

power line conditions.

FEATURES

• Protection of three-phase motors from loss of any

phase, low-voltage, phase reversal, voltage unbalance,

and high voltage

• Adjustable restart delay

• Adjustable trip delay

• Adjustable voltage-unbalance trip point

• Four diagnostic LEDs show overvoltage, undervoltage,

voltage unbalance, reverse-phase and normal

conditions

• UL and ULC listed

• Single-phase condition detection regardless of

regenerated voltages

Motor

L2 L3

Start

Stop

Hand

Auto Pilot

Off

Control

Voltage

355 Series

WIRING

MODEL DESCRIPTION

355-200 Three-phase voltage monitor, 190-240 VAC

355-400 Three-phase voltage monitor, 380-480 VAC

355-600 Three-phase voltage monitor, 575-600 VAC

SPECIFICATIONS

355-400

Shown de-energized

* 50 Hz will increase all delay times by 20%.

March 2014

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Delta MCS-1800 Specifications Page 49

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