MEGGER MS-2A | Circuit Breaker and Over Current Relay Test Set
A variable DC voltage is needed to test a circuit breaker. Substation batteries should not be used since this entails considerable risk for testing personnel, testing equipment and also for the equipment being tested. The best way to ascertain whether or not solenoids and protective mechanisms are sluggish or set improperly is to perform a test at minimum tripping voltage. The minimum trip voltage test is described in a number of international and national standards such as IEC 62271-100, ANSI C37.09 etc. B10E DC Voltage Power Supply can be used to test breaker coils in this manner. It provides a ripple-free variable DC voltage that can easily accommodate a high, variable load.
- Light Weight, Portable Primary Injection Test Instrument
- Overcurrent Relay Testing
- Ground Fault Performance Testing for NEC 230.95
- Circuit Breaker Testing
The MS-2A circuit breaker and overcurrent relay test set is one of our more popular test set and has been used around the world by several thousand utility companies, industrial plants, and electrical service organisations. This relay tester is capable of testing the time-delay characteristics of overcurrent relays, motor overload relays, and molded-case circuit breakers rated up to 125 amperes, when following the recommended test procedure of testing the time delay of these devices at three times their rating.
Higher currents are available for the short durations required to test an instantaneous trip element. For example, the test set will provide a maximum short- duration output of 750 amperes through a typical, 125 ampere, molded-case circuit breaker. The MS-2A is ideal for testing earth/ground fault protection devices with window CT's. The NEC 230.95C requires specific earth/ground fault devices be performance tested when initially installed.
Higher currents are available for the short durations required to test an instantaneous trip element. For example, the test set will provide a maximum short- duration output of 750 amperes through a typical, 125 ampere, molded-case circuit breaker. The MS-2A is ideal for testing earth/ground fault protection devices with window CT's. The NEC 230.95C requires specific earth/ground fault devices be performance tested when initially installed.
APPLICATIONS
Model MS-2A is capable of testing the time-delay characteristics ofovercurrent relays, motor overload relays and molded-case circuitbreakers rated up to 125 amperes, when following the recommendedtest procedure of testing the time delay of these devices at three timestheir rating.
Higher currents are available for the short durations required to testan instantaneous trip element. For example, the test set will provide amaximum shortduration output of 750 amperes through a typical, 125ampere, molded-case circuit breaker
The MS-2A is ideal for testing ground fault protection devices withwindow CT's. The NEC 230.95C requires specific ground fault devicesbe performance tested when initially installed.
The MS-2A is commonly used by many utilities and serviceorganizations as a economical light weight overcurrent relay testsystem.
Additional applications include verifying the ratio of currenttransformers and testing panelboard ammeters and voltmeters.
FEATURES AND BENEFITS
- Rugged and lightweight: Unit weighs only 33 lb (15 kg) and istough enough to withstand daily field or plant use.
- Digital memory ammeter: High accuracy, direct-readinginstrument has read-and-hold memory for measurement of shortdurationcurrents. Ideal for testing ground fault devices, overcurrentrelays and molded-case circuit breakers.
- Digital, multirange timer: Crystal-controlled, high-accuracyinstrument with autoranging measures operating time to 1millisecond.
- High-current output: Provides instantaneous currents up to 750amperes through a 125 ampere breaker in a small 33lb (15kg)package.