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Output Ranges

Output Capacity
The output circuit is designed to permit short duration overloads and the output ranges will provide several
times their current rating, provided the output voltage is sufficient to push the desired current through the impedance of the test circuit.

The test set is capable of testing the time-delay characteristics of devices rated up to 125 A using a test current of three times their rating (375 A). Additionally, to perform an instantaneous trip test, it will provide 750 A through a typical, 125 A, molded-case circuit breaker connected with the test leads provided with the test set.

Overload Capability
To increase use of the test set, it is designed so that the current ratings may be exceeded for short durations. Because the magnitude of the output current is determined by the impedance of the load circuit, the voltage
rating must be sufficient to push the desired current through the device under test and the connecting test leads.

Percentage
Rated Current

Maximum
Time 'ON'

Minimum
Time 'OFF'

Output Initiate Circuit
The test set uses a solid-state output initiating circuit. To increase reliability and eliminate contact
maintenance, this circuit uses a triac instead of a contactor to initiate the output.

The initiating circuit provides momentary and maintained modes to control output duration. The momentary mode is used whenever the output is to be on for a short duration, such as when performing instantaneous trip tests, or to avoid damage or overheating of the device under test while setting the test current. In the maintained mode, the output remains energized until manually turned off or, when performing timing tests, until the device under test operates — which both stops the timer and de-energizes the output.

Instrumentation

Timer Control Circuit
This circuit automatically starts the timer when the output is energized and automatically stops the timer and de-energizes the output when the device under test operates. This circuit accommodates the following test conditions by simple switch selection of the appropriate mode:

Current Actuated
Used to test a device that has no auxiliary contacts to monitor, such as a single-pole circuit breaker. The timer stops when the output current is interrupted.

Normally Closed
Used to test a device with normally closed contacts. The timer stops and the output is de-energized when the
contacts open.

Normally Open
Used to test a device with normally open contacts. The timer stops and the output is de-energized when the
contacts close.

Enclosure
The test set is housed in a high strength, molded, suitcase-type enclosure with carrying handle and removable cover. Storage space is provided for test leads.

Dimensions
9.9" (H) x 14" (W) x 11" (D)
25cm (H) x 35cm (W) x 28cm (D)

Weight
33 lb (15 kg)

Phone: 61 2 4353 4644 

Mobile: 0412 678 925