Máy tạo dòng điện 100A/E
Features
- Wide range of output currents
- AC and DC voltage outputs
- All outputs continuously variable
- Output current metering from 40mA-200A
- Automatic switch-off in all modes of operation
- Multi-function timing system
- Suitable for testing thermal devices
- Compact and highly portable
- Voltage and current outputs available simultaneously
T&R Test Equipment is a market leader in the field of current injection equipment. The range includes secondary injection units with 100A output capability up to 6000A primary injection systems. All have true RMS metering, a flexible iming system, and an easy to understand user interface. The 100A/E Mk3 secondary current injection test set has been designed to give the maintenance and commissioning engineer a large number of facilities in one self-contained instrument. The unit is portable, compact and simple to use. The mains supply for the unit is either 240V±10% or 115V +10% -6% at either 50 or 60Hz. Full load can be obtained at the supply voltage extremes. The current and voltage outputs are independently controlled and metered. The output current and voltage are displayed on large, clear panel instruments. An additional four range CT is provided, extending the ammeter range down to 0-100mA.
All of the outputs are fully isolated by means of double wound transformers. The timing system on the 100A/E is very flexible, without compromising ease of use. Four modes of operation and two contact inputs are provided allowing for a wide range of events to be timed. Both contact inputs automatically select for normally open or normally closed contacts. Operation of the different timing modes is described below. Internal start mode starts the timer when the ‘on’ pushbutton is pressed, and stops the timer when the first contact set changes state. This mode is ideally suited to timing over-current relays.
Single contact mode starts and stops the timer on the first and second changes of state of the fist contact set, and dual contact mode starts the timer from the first set of contacts and stops it from the second set. These modes allow reset and re-close times of protective devices to be easily measured.
The final mode of operation of the timer starts the timer when the current exceeds 20% of the selected metering range, and stops it when the current falls below 20%. This allows the timing of trips with no auxiliary contacts such as miniature circuit breakers.
Automatic control has been provided such that all outputs can be switched off once the device under test has operated. The automatic control can be switched in or out of circuit for all outputs, enabling setting up procedures to be carried out. The instrument is housed in a robust case complete with a protective cover and fold away carrying handles.
100A/E Mk3 Specification
Current Output
The current output on the unit has eight ranges, allowing the selection of output voltages up to 150V and output currents up to 200A. The current outputs may also be used as voltage outputs.
Range Continuous 5 minutes 1 minute VAC
200A 50A 100A 200A 0-5V
50A 25A 50A - 0-10V
25A 12.5A 25A - 0-20V
10A 5.0A 10A - 0-50V
5.0A 2.5A 5.0A - 0-50V
2.5A 1.25A 2.5A - 0-50V
1.0A 0.5A 1.0A - 0-150V
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.
Voltage Output
The voltage output on the unit has three ranges, allowing the selection of output voltages up to 500Vac and 250Vdc.
Voltage Output current
Range Continuous 5 minutes
0-250Vac 0.5A 1.0A
0-500Vac 0.25A 0.5A
0-250Vdc 0.5A 1.0A
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 an analogue true RMS system with separate instruments for current and voltage. AC current is metered by a dual scaled ammeter reading 0-1Aand 0-5A.
The following scaling factors are used:
Range 1A Scale 5A Scale Accuracy
0.1A x0.1 x0.02 Class 1.5
0.25A x0.25 x0.05 Class 1.5
0.5A x0.5 x0.1 Class 1.5
1.0A x1 x0.2 Class 1.5
2.5A x2.5 x0.5 Class 1.5
5.0A x5 x1 Class 1.5
10A x10 x2 Class 1.5
25A x25 x5 Class 1.5
50A x50 x10 Class 1.5
100A x100 x20 Class 1.5
200A x200 x40 Class 1.5
AC voltage is metered by a dual scaled ammeter reading 0-300V and 0-600V. The following scaling factors are used:
Range 300V Scale 600V Scale Accuracy
300V x1 x0.5 Class 1.5
600V x2 x1 Class 1.5
Timing System
Range 0-999.999s
Resolution 1ms
Accuracy ±0.1% rdg ±2d (all modes except current op.)
Accuracy ±0.1% rdg ±3d (current operated mode)
The contact circuit has an open circuit voltage of 24Vdc and a short circuit current of 100mA. 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 > 20% Current < 20%
of range of range
The output may be automatically switched off at the end of the test to safeguard the relay under test. This is selectable for both the voltage and current output.
Protection and Safety
The unit is protected by the following fuses:
Input supply T5A 240V supply
T10A 115V supply
Output supplies T3.15A
Contacts F0.25A
Aux CT circuit T315mA and T1.25A
An earth terminal is provided for connection to a local earth.
Supply Requirements
115V+10%-6% 50/60Hz 1ph 1450VA max
240V±10% 50/60Hz 1ph 1450VA max
Temperature Range
Storage -20°C to 60°C
Operating 0°C to 45°C
Dimensions Weight
490mm x 300mm x 300mm 33kg
Accessories
Operating manual
2m mains lead
Non-latching contact lead
Spare fuse set
Optional Accessories
100AFS Filter unit
100AFS-PH Filter unit
100AL lead set
