Product Overview
Circuit Breaker Tester - Multi-Amp CB-832 Circuit Breaker and Overload Relay Test Set
Condition: Used, clean and in good physical condition. Tested to power up.
The Multi-Amp CB-832 is a high-current test set designed for testing circuit breakers and overload relays through primary current injection.
This versatile and self-contained unit incorporates a variable high-current output along with advanced control circuitry and instrumentation for comprehensive testing of various electrical protection devices.
Key Features:
- Digital memory ammeter for accurate current measurement
- Digital multirange timer with millisecond precision
- High-current output up to 1800 amperes
- Solid-state output initiate circuit for improved reliability
- Built-in overload and short-circuit protection
- Durable enclosure with carrying handles and protective cover
Applications: The CB-832 excels in testing and calibrating:
- Thermal, magnetic, and solid-state motor overload relays
- Molded-case circuit breakers
- Ground-fault trip devices
- Current transformers (ratio verification)
- Panelboard ammeters and voltmeters
Performance Highlights:
- Capable of testing magnetic overload relays up to 500 amperes
- Can test time-delay characteristics of thermal devices up to 225 amperes
- Provides short-duration currents up to 1800 amperes for instantaneous trip testing
Technical Specifications:
- Input: 120V or 240V, 50/60 Hz, single-phase (specify when ordering)
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Output Ranges:
- 0 to 500 A at 3.5 V max
- 0 to 125 A at 14 V max
- 0 to 25 A at 70 V max
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Continuously adjustable output in three ranges
- Solid-state output initiation using triac technology
- Momentary and maintained output control modes
Frequently Asked Questions
Q: What types of circuit breakers can the CB-832 test?
A: The CB-832 is designed to test a wide range of circuit breakers, including molded-case circuit breakers up to 225 amperes. It can perform both time-delay characteristic tests and instantaneous trip tests.
Q: How accurate is the timing function on the CB-832?
A: The CB-832 features a crystal-controlled digital multirange timer that can measure operating times with 1-millisecond accuracy, ensuring precise timing for critical protection device testing.
Q: Can the CB-832 be used for field testing or is it primarily for laboratory use?
A: While robust enough for laboratory use, the CB-832 is designed with portability in mind. Its durable Formica enclosure, carrying handles, and protective cover make it suitable for field testing applications as well.
Q: What safety features does the CB-832 incorporate?
A: The CB-832 includes built-in overload and short-circuit protection to safeguard both the operator and the equipment during testing procedures. Additionally, its solid-state output initiate circuit enhances overall reliability and safety.
About Multi-Amp Corporation
Multi-Amp Corporation, now part of Megger Group Limited, has been a pioneer in electrical test equipment since its founding in 1951. Based in Dallas, Texas, Multi-Amp focused on developing innovative solutions for relay and circuit breaker testing.
In 1984, Multi-Amp achieved a significant milestone by introducing the world's first three-phase relay tester, showcasing their commitment to advancing electrical testing technology. The company's expertise in high-current test equipment made them a natural fit when they joined AVO International (later renamed Megger) in 1995.
Today, as part of the Megger family, the legacy of Multi-Amp lives on in products like the CB-832, which continue to set industry standards for circuit breaker and relay testing equipment.