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Description

The TVW Series Provides protection for motors and other

sensitive loads. Continuously measures the voltage of each

of the three phases using a microcontroller circuit design

that senses under and overvoltage, voltage unbalance, phase

loss, and phase reversal. Protection is provided even when

regenerated voltages are present. Includes a trip delay to

prevent nuisance tripping and a restart delay to prevent short

cycling after a momentary power outage.

Operation

Upon application of line voltage, the restart delay begins.

The output is de-energized during restart delay. Under normal

conditions, the output energizes after the restart delay.

Undervoltage, overvoltage, and voltage unbalance must be

sensed for the complete trip delay period before the output

de-energizes. The restart delay begins as soon as the output

de-energizes. If the restart delay is completed when a fault is

corrected, the output energizes immediately. The output will not

energize if a fault is sensed as the input voltage is applied. If the

voltage selector is set between two voltage marks (i.e. between

220 and 230V), the LED will flash red rapidly. The TVW provides

fault protection at the lower of the two line voltages (i.e. 220V).

Reset: Reset is automatic upon correction of a fault.

LED Operation

The LED flashes green during the restart delay, then glows

green when the output energizes. It flashes red during the trip

delay then glows red when the output de-energizes. It flashes

red/green if phase reversal is sensed. If the voltage selector

knob is between settings, it rapidly flashes red.

FEATURES BENEFITS

Proprietary

microcontroller based

circuitry

Constant monitoring to protect against phase loss,

phase reversal; over, under, and unbalanced voltage;

short cycling

Compact design

measures 2 in.

(50.8mm) square

Perfect for OEM applications where cost, size and

ease of installation are important

LED indication Provides diagnostics of relay, fault and time

delay status

Encapsulated Protects against shock, vibration and humidity