Máy tạo dòng điện HTI 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

timing 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 0-1A

and 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