Three Phase Current Injection System - T&R Model 50A-3PH specifications

	High Current Test System
50A-3PH Current Injection System

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Product Specifications

Main Output
The main output on the unit has two taps, allowing the selection of output voltages up to 18V and output currents up to 50A.

Range	Continuous	5 minutes	1 minute
3.5V	16A	32A	50A
18V	4A	8A	12A

The above intermittent on times must be followed by an off time of 15 minutes, and are based on an ambient
temperature of 25°C.

Metering
The output is metered by a digital true RMS system with a memory ammeter - whenever the timer stops and the
output is switched off, the current reading is held on the display. The current output from each phase is shown
simultaneously on the display.

Range	Resolution	Trip Current	Accuracy
5.000A	0.001A	5.25A	±0.6% of reading +5 digits
20.00A	0.01A	21A	±0.6% of reading +5 digits
50.00A	0.01A	52.5A	±0.6% of reading +5 digits

A current trip is automatically set to 105% of full scale of the current metering range to protect the device under test.

Auxiliary Metering Inputs
An auxiliary metering input is provided which is able to measure RMS voltage or current. In addition the
frequency of the external input may be measured, and the phase measured between any of the phase outputs and the auxiliary metering input.

Setting	Range	Resolution	Accuracy
Volts AC	270V	0.1V	±0.7% of reading +5 digits
Amps AC	5.000A	1mA	±0.7% of reading +5 digits
Phase	±180°	0.1°	±3°
Frequency	20 to 1000Hz	0.1Hz	±0.2% of reading +1 digits

The current input is protected by a F6.3A fuse.

Auxiliary Output
A single phase isolated auxiliary output is provided on the 50A-3PH with a maximum rating of 33VA.

Range	Maximum VA	Output Current
110V	33VA	300mA
230V	33VA	150mA

Lead Set specifications
The 50A-3PH is supplied with a lead set including the following items:
6 x 3m 4mm2 output leads terminated in 4mm plugs.
2 x 3m 2.5mm2 auxiliary leads terminated in 4mm plugs
2 x 0.5m 2.5mm2 link leads terminated in 4mm plugs
The lead set is supplied in a plastic carrying case.

Supply Requirements
The supply voltage requirements for the unit must be specified at the time of ordering. The unit is available for
operation from either a 400V 4 wire supply or 220V 3 wire supply. The optional delta-star supply transformer allows the 400V unit to operate from other supply voltages.

Supply option 1:	400V-10%+14%	50/60Hz	3ph	1000VA
Supply option 2:	220V -6%+14%	50/60Hz	3ph	1000VA

Timing System

Range	0 to 999.999s
Resolution	1ms
Accuracy	0.1% of reading +2 digits	(+4 digits in current operated mode)

The contact circuit has an open circuit voltage of 24Vdc and a short circuit current of 10mA. Each contact circuit will auto-select for normally open or normally closed contacts. A DC voltage of 24-240Vdc may also be used to trigger either timer channel.

The following functions are provided:

Mode	Timer Start	Timer Stop
Internal Start	Press 'ON'	Contact 1
Single Contact	Contact 1	Contact 1
Dual Contact	Contact 1	Contact 2
Current Operated	Current >10% of range	Current< 10% of range

Pulse mode is used for setting the current level in devices sensitive to heating, and allows current to be injected for 600ms and the current recorded.

Current operated mode operates on one output phase (selectable). The output is automatically switched off at the end of the test to safeguard the relay under test.

RS232 Communication Port
An RS232 port is provided to allow connection of a printer.

Protection and Safety
The unit is protected by electronic over current and duty cycle trips on the outputs, thermal monitoring on the
power components, and fuses on the input and regulator. An earth terminal is provided for connection to a local
earth.
The unit is designed to comply with BSEN61010, and is CE marked.

Temperature Range

Storage Temperature		-20°C to 60°C
Operating Temperature		0°C to 45°C

Dimensions

380mm x 314mm x 221mm

Weight
21kg (including handle and corner protectors)

Accessories Supplied with Instrument
Operating manual, output lead set, mains lead, spare fuse set.

Optional Accessories
Delta-Star supply transformer, filter unit and printer.

Optional Delta-Star Supply Transformer
The optional delta-star supply transformer allows operation from 115V, 230V, 400V, and 440V 3 wire supplies, is selected by a switch on the unit. An auxiliary single phase output is also provided to supply power to a DVS3 voltage source.

Input	115V, 230V,400V, 440V ±10%
	3-wire, 1500VA maximum
3Φ Output	400V 4 wire 600VA 1 minute 'ON' 15 minutes 'OFF'
1Φ Output	230V 300VA 5 minutes 'ON' 15 minutes 'OFF'

50A-3PH Features