Relay Test Set (ZNT33)

Product Description

The Set is in two units.

i) Current Source, Voltage Source & Measuring Unit:

Current circuit, AC & DC voltage circuits, protective circuit, contactor, measuring circuits etc. will all be housed within sturdy MS cabinet. Also meters, terminals, indicators, regulator knobs, timer display etc. will be fitted on the horizontal panel of the same cabinet which can be approached by opening the top hinged lid. Wheels will be provided for easy movement.

ii) Phase Shifter Unit:

Static type phase shifting transformer will be housed within this MS unit. Input output interconnection socket, Phase

Shifting 'Coarseï & 'Fineï control knobs are fitted on the horizontal plane of the sturdy MS cabinet, which can be approached by opening the top, hinged lid.

Special Features:

Fault phase voltage adjustable between 0 to 100%.

Fault current adjustable between 0 to 100%.

Phase angle adjustment & measurement 00 to 3600.

Digital Time Interval meter.

Voltage & Current indications by digital meters.

While testing is in phase-to-phase fault mode, selectable phase currents i.e. say, R-Y will be in opposition. The neutral & remaining third phase current, B, will then be absent. For this, selectable switch is provided.

Technical Features:

Input Voltage : 415V, 3 phase, 4 wire, 50Hz. AC.

Output(s)

[a] Test Current:

0 to 1, 5, 10, 25 & 50A having 0 - to 100% regulation in each tap. Rated maximum burden: 250VA.

Duty cycle:

i) Continuous upto 10A.

ii) 25A & 50A outputs are rated for intermittent duty cycle ie. 25A - 3 minutes 'ONï & 50A - 30 secs 'ONï.

[b] Test Voltages:

AC voltage source:

110 volts, phase to phase, 63.5 volts phase to neutral, and 3 phase 50Hz. AC continuously variable from 0 to 100%. Rated maximum burden: 250VA.

Fixed DC voltage source:

Isolated fixed

30V/110V/220V DC of 100VA, without metering will be available for 30 mins.

[c] Phase Angle Variation:

0 to 3600 between voltage & current.

[d] Time measurement:

0-9.999secs. & 0-99.99secs. in two steps.

Current Circuit:

Loading Transformer:

Double winding loading transformer of suitable burden to provide corresponding current output specified before.

Measuring CT:

Multi-ratio wound primary current transformer:

Ratio: 1-5-10-25-50/1A with current range selectable rotary switch.

Variable Auto-transformer:

[1 no. for each phase] For smooth variation of current output at various ranges selected.

Tripping circuit:

The current output would be cutoff incase of any overload or even if the relay under test actuates.

Metering: CT operated ammeter

Range: 0 to 1A AC. Scaled: 0 to 100% for all the selected current ranges. Accuracy: ï1%. Resolution: 0.1%.

Voltage Circuit:

Variable Auto-transformer:

[1 no. for each phase] For smooth variation of voltage output from zero to rated voltage. Fault mode selector switch

Metering: Voltmeter with phase selector.

Range: 0 to 200V.

Accuracy: ï1%. Resolution: 0.1V.

DC Voltage circuit:

Double wound multitap isolated transformer is provided for fixed DC voltage sources. 30V/110V 220V are selected one at a time by selector switch.

Phase Shifter Circuit:

Static Type Phase Shifting Transformer

Primary Voltage: 415V, 3 ph., 50Hz. AC.

Secondary Voltage: 110V, 3 ph. 50Hz. AC.

0 to 3600 phase angle variation by coarse and fine control.

Coarse control will be in steps of 600 while fine control will be of + 300

Capacity: 250VA.

Metering:

Phase Angle Meter: 3600.

Resolution: 10.

There will be provision for phase selection by selector switch.

Timer Circuit:

Measuring Range Resolution

9.999secs. 0.001sec.

99.99secs. 0.01sec.

Display : Seven segment LED.

Accuracy : ï1%.

Terminals to relay contacts.

Reset push button.

Selector for NO & NC contact.

Potential free start timer for opening or closing of auxiliary contact of the contactor.

Interconnection Cable:

Necessary cables of 1-meter length along with plug will be provided for interconnection between two units.

Mains Input Cable:

Four-core cable of 5 meters length will be provided. All the meters will be digital type.

Documents:

Operation Manual(Instruction Manual)

Works Test Report

Warrantee Certificate