Introduction; General Description - ETI PI-800 Instruction Manual

Electrical Test Instruments PI-800 and PI-1600
Section I - General Information and Specifications
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INTRODUCTION

A primary injection test set, such as the PI-800 and PI-1600, is a device with high
current, low voltage AC outputs for testing direct acting low voltage circuit
breakers. Current is injected through the main contacts of the breaker to simu-
late actual fault conditions, which tests the operation of CTs, solid state, thermal,
or electromechanical trip devices, and the actual trip mechanisms and breaker
contacts.

GENERAL DESCRIPTION

The PI-800/1600 Circuit Breaker Test System incorporates modular design and
flexibility to provide unequaled capability in a portable package. The PI-800
used alone, on 120 or 240 VAC supplies, generates continuous current of 400,
800, or 1600 amps at 4.2 kVA, with peak output to over 10x. The PI-Aux boosts
total power to 9.8 kVA, and allows testing of drawout breakers and MCBs to 1600
A. The units are housed in rugged interlocking suitcase-size enclosures. Each
piece weighs no more than 125 pounds, allowing one-person hand truck mobil-
ity. Basic operation is very simple, and the proven MAC-21 provides optimal out-
put control and measurement.
The PI-800 is a versatile and technologically advanced portable primary injec-
tion test set capable of testing circuit breakers up to 800 amperes frame size. It
incorporates a special lightweight toroidal output transformer with dual prima-
ries to facilitate its use on power sources of 120 VAC as well as 240 VAC, and quad
secondaries to provide optimal impedance matching to a wide range of breaker
sizes. Internal fan cooling allows maximum utilization of the output transformer
and faster recovery after overload conditions.
The PI-800 consists of a strong aluminum frame, housed in a rugged plastic and
aluminum enclosure with removable sealed front and back lids for maximum
protection of controls and indicators, as well as storage for test leads, manuals,
etc. All controls, indicators, and input connections are on the front panel. The
versatile 50-amp input plugs may be connected to heavy duty portable cords
with a variety of connectors for 120 VAC, 208 VAC, or 240 VAC. Individual leads
may also be used to connect to buswork. The output connections are on the
rear, along with an auxiliary Output ON indicator, configuration switch, and air
output from the fans, which can help cool cables and breakers. Comfortable re-
cessed side handles provide ease of mobility.
The MAC-21 is supplied in a separate rugged portable case, interlocks on top of
the PI-800, and connects to a cable in the rear of the test set.
The eight-silver plated output bus connectors allow configuration for continu-
ous outputs of 800 amperes at 4.2 VAC, and 400 amperes at 8.4 VAC, for testing
molded case breakers with cables. They can also be connected for 1600
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