Vanguard Instruments RFD-200 2 Series User manual

Operating Procedures RFD-200 S2™
USER’S MANUAL
For the
Model RFD-200 Series 2
Portable Relay Test Set
Vanguard Instruments Company
1520 S. Hellman Ave.
Ontario, California 91761
TEL: [phone] October 2006
FAX: [phone] Rev. 1

Operating Procedures RFD-200 S2™
SAFETY SUMMARY
Always Follow Exact Operating Procedures
Any deviation from the procedures described in this operators’ manual may create one or more
safety hazards, damage the Model RFD-200 S2, or cause errors in the test results; Vanguard
Instruments Co., Inc. assumes no liability for unsafe or improper use of the Model RFD-200 S2.
The following safety precautions must be observed during all phases of test set-up, test hookups,
testing, and test-lead disconnects.
SAFETY WARNINGS AND CAUTIONS
This device shall be used only by trained operators.
All devices under test shall be off line and fully isolated.
Do Not Modify Test Equipment
Because of the risk of introducing unknown hazards, do not install substitute parts or perform
any unauthorized modification to any Model RFD-200 S2 Test Unit. To ensure that all designed
safety features are maintained, it is recommended that repairs be performed only by Vanguard
Instruments Co. factory personnel or by an authorized repair service. Unauthorized
modifications can cause serious safety hazards and will nullify the manufacturer's warranty.

Operating Procedures RFD-200 S2™
Table of Content
1.0 INTRODUCTION ...............................................................................................................1
1.1 General Description...........................................................................................................1
1.2 Functional Description......................................................................................................2
1.3 Furnished Test Accessories ...............................................................................................2
2.0 RFD-200 S2 Specifications ..................................................................................................3
3.0 CONTROLS AND INDICATORS.......................................................................................4
3.1 RFD-200 S2 Auxiliary Power Supply................................................................................6
3.2 RFD-200 S2 Current Source and Voltage Sources.............................................................6
3.3 RFD-200 S2 Control Switches...........................................................................................7
3.4 Timer Start and Timer Stop Inputs ....................................................................................8
3.5 RFD-200 S2 Power Resistors............................................................................................9
3.6 RFD-200 S2 External Voltage Input..................................................................................9
3.7 RFD-200 S2 External Current Input..................................................................................9
4.0 RFD-200 S2 Application....................................................................................................10
4.1 Setting Voltage or Current source....................................................................................10
4.2 Set RFD-200 S2 for a Time Delay Test...........................................................................11
4.4 User RFD-200 S2 Timer in the Single Input Mode..........................................................13
4.5 Use RFD-200 S2 to Plot a Current Transformer Excitation Curve ...................................14
4.6 Use RFD-200 S2 to Measure CT primary and Secondary Current ...................................15
Table of Figures
Figure 1 RFD-200-S2 Front Panel Call Out................................................................................4
Figure 2 RFD-200-S2 Aux Power Supplies................................................................................6
Figure 3 RFD-200-S2 Current and Voltage Sources...................................................................6
Figure 4 RFD-200 S2 Control Mode Switches ...........................................................................7
Figure 5 Timer Start and Stop Inputs...........................................................................................8
Figure 6 Power Resistor Array...................................................................................................9
Figure 7 External Voltage input .................................................................................................9
Figure 8 External Current Input .................................................................................................9
Figure 9 Typical Over Current Relay Connection.....................................................................11
Figure 10 Typical Circuit Breaker Timing Connection.............................................................12
Figure 11 Typical CT Excitation Test Connection....................................................................14
Figure 12 Typical CT Turns Ratio Test Connection .................................................................15

Operating Procedures RFD-200 S2™
1
1.0 INTRODUCTION
1.1 General Description
The Model RFD-200 Series 2 (or RFD-200 S2) is a second-generation, microprocessor-based,
single-phase relay tester. The Model RFD-200 S2 was designed specifically to test
electromechanical, electronic, and microprocessor–based current or voltage relays. An AC
current source with 3 outputs (10A, 40A, and 100A) provides test current to the relays but can
also be used as a stand alone current source. One 0-250Vac voltage source and one 0-300Vdc
voltage source are available for testing relays or can be used as stand alone voltage sources.
The RFD-200 S2 has a built-in timer with independent start and stop trigger inputs designed to
measure the time between event transitions. The elapsed time is displayed in milliseconds and
cycles.
The RFD-200 S2 timer Start and Stop inputs has 3 different trigger modes:
Internal trigger Mode: The timer can be started or stopped by the turning on or off the
RFD-200 S2 voltage or current source.
Dry Contact Mode: A change of state of a dry-contact input will start or stop the timer.
Wet Contact Mode: The timer can be started or stopped by the presence or absence of a
voltage.
Three auxiliary power supplies (24Vdc, 124Vdc, 240Vac) are available to power electronic
relays under test. Each power supply is fused protected.
The RFD-200 S2 voltage and current source outputs are set by the front panel control knob. The
AC current source output is displayed on the RFD-200 S2 4 lines by 20 character back-lit LCD.
An external voltage input (0-600V) allows the user to monitor the RFD-200 S2 AC or DC
voltage outputs or any other external voltage input.
An external current input (0-6A) is available to measure current.

Operating Procedures RFD-200 S2™
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1.2 Functional Description
The RFD-200 S2 is designed specifically to test single-phase (over/under) voltage and current
protection relays. Since the current source is capable of outputting up to 100A, the RFD-200 is
ideal for testing electromechanical protection relays.
The RFD-200 S2 can also be used as an AC current source and AC or DC voltage source. Other
applications include testing CT ratios, and testing CT excitation curves.
The built-in timer can also be used as an event timer. Independent Start and Stop inputs allow
the timer to be used in different timing applications.
Three auxiliary power supplies (24Vdc, 124Vdc, 240Vac) allows the RFD-200 S2 to power
electronic relays under test.
1.3 Furnished Test Accessories
The Model RFD-200 S2 is supplied with a power cord, one set of 8-foot current cables, one 8-
foot timer start cables, one 8-foot timer stop cables, one 8-voltage cables, one ground cable, and
a duffel bag. A hard shipping case is also available as an optional item.
AC Current Output
Range No-Load Voltage Load Voltage Load Current Load/Unload Times
10A 90Vac 75Vac 10A 2 min / 15 min
40A 25Vac 20Vac 40A 1 min / 15 min
100A 10Vac 7.25Vac 100A 1 min / 15 min
100A 10Vac 3Vac 250A 1 sec / 5 min
AC Voltage Output
Range No-Load Voltage Load Voltage Load Current Load/Unload Times
240 260 240Vac 3A 10 min / 45 min
DC Voltage Output
Range No-Load Voltage Load Voltage Load Current Load/Unload Times
300Vac 300Vac 250Vac 2A 10 min / 45 min
Auxiliary Power Supply Voltage Outputs
Range No-Load Voltage Load Voltage Load Current Load/Unload Times
24Vdc 28Vdc 24Vdc 1A Continuous
124Vdc 136Vdc 130Vdc 1/4A Continuous
240Vac 260Vac 250Vac 1/8A Continuous
RFD-200 Timer Display
Range Resolution Accuracy
0 to 9.999 Sec 1 ms ?1 ms
10.00 to 99.99 10 ms ?10 ms
100.00 to 999.999 sec 100 ms ?100 ms
RFD-200 Timer Cycle Display
Range Resolution Accuracy
0 to 9.999 Cycles 0.1 cycles ?1 ms
1000 to 49,999 (50 Hz) 1 cycle ?10 ms
1000 to 59,999 (60Hz) 1 cycle ?100 ms

Operating Procedures RFD-200 S2™
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2.0 RFD-200 S2 Specifications
Table 1.0 RFD-200 S2 Specifications
MODEL.................................................RFD-200 S2
TYPE ....................................................Special-purpose test equipment, Single Phase Relay
.............................................................tester
INPUT POWER.....................................90 - 130 V ac or 210-240 V ac (user specified), 50/60 Hz
SIZE ... .................................................16.8” W x 12.6” H x 12” D (42.7 cm x 32.0 cm x 30.5 cm)
WEIGHT ...............................................40 lbs (20 Kg)
VOLT METER.......................................0 to 600V; Accuracy: ?1% of reading ?1 volt for AC;
........... .................................................Accuracy: 0.5% of reading ?1 volt for DC
AMPERE METER .................................0 to 250A, Accuracy: ?2% of reading, ?10mA
(INTERNAL)
AMPERE METER .................................0 to 6A, Accuracy: ?1% of reading, ?10mA (AC)
(EXTERNAL) ........................................0 to 6A, Accuracy: ?0.5% of reading, ?10mA (DC)
DISPLAY ..............................................Backlit LCD, 4 lines by 20 characters
COMPUTER INTERFACES ..................RS-232C; 19200 Baud (Diagnostic Testing)
FURNISHED.........................................One power cord, One set of 8-ft current cables,
........... .................................................One 8-ft timer start cables, One 8-ft timer stop cables,
........... .................................................One 8-ft voltage cables, One ground cable,
........... .................................................and One cable duffel bag
WARRANTY .........................................One-year warranty on parts and labor; post warranty
service contracts available
NOTE:
THE ABOVE SPECIFICATIONS ARE VALID AT NOMINAL OPERATING VOLTAGES AND AT A TEMPERATURE OF
25?C (77?F)
SPECIFICATIONS MAY BE UPGRADED AND CHANGED WITHOUT PRIOR NOTICE.

Operating Procedures RFD-200 S2™
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3.0 CONTROLS AND INDICATORS
(See Figure 1.0 and refer to Table 2.0).
The RFD-200-S2 controls and indicators are shown in the front panel illustration (see
Figure 1.0 below). Pointing leader lines reference each item in the figure with an index
number. Each index number is cross-referenced to a functional description in Table 2.0,
which describes the purpose of each item on the control panel. Although the purpose of
these controls and the display may seem obvious, users should become familiar with
them before attempting to use the RFD-200-S2. First-time users should review and
become familiar with the Safety Summary located in the front section of this manual.
Figure 1 RFD-200-S2 Front Panel Call Out

Operating Procedures RFD-200 S2™
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Table 2.0 RFD-200 S2 Controls and Indicators
Fig. 1
Index PANEL MARKING FUNCTIONAL DESCRIPTION
1 & 2 TIMER START Timer Start Input Connectors.
3COM Current source common.
4Timer Stop Selection Switch.
5100A 100A current source terminal.
6Timer Start selection Switch.
740A 40A current source terminal
8METER SELECT Internal/External current display selection
switch.
910A 10A current source terminal.
10 & 11 0-240VAC
3A AC Voltage Source.
12 & 13 0-300VDC
3A DC Voltage Source
14 & 29 EXT INPUT CURRENT External Current Input Terminals
15, 16,
17, 18,
19
Power Resistor array
20 (no Marking) 4 lines by 20 character backlit LCD
21 120VAC 10A 50-60Hz Power Switch with built-in circuit breaker
22 & 23 VOLTAGE INPUT
600V MAX External voltage input connector
24 RS-232 RS-232C port. Diagnostic port
25 OUTPUT CONTROL Voltage and current source control knob
26 & 27 ?? RFD-200 timer, current source & Voltage source
control switches
28 (no marking) External current input circuit breaker
30 CONTRAST LCD contrast control
31 240Vac .125A 240Vac power supply fuse (1/8 A)
32 124Vdc .25A 124Vdc power supply fuse (1/4 A)
33 PWS SELECT Aux. Power supply selection switch
34 24Vdc 1A 24Vdc power supply fuse (1A)
35 & 36 240-260Vac 240Vac power supply output
37 AUX PWS ON/OFF Power supply ON/OFF switch
38 & 39 124-136Vdc 124Vdc power supply output
40 & 41 24-28Vdc 24Vdc power supply output
42 & 43 TIMER STOP Timer Stop input connectors

Operating Procedures RFD-200 S2™
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3.1 RFD-200 S2 Auxiliary Power Supply
The RFD-200 S2 provides 3 auxiliary power supplies (24Vdc, 124Vdc, 240Vac) to
power electronic relays. Each power supply is fuse protected.
These power supply outputs are controlled by the AUX PWS ON/OFF switch. A LED is
lit to indicate when power supply output is turned on.
Only one of the auxiliary power supply can be selected at a time. The PWS SELECT
switch allows the user to select which power supply is to be used. An active power
supply is indicated by a lit LED.
Figure 2 RFD-200-S2 Aux Power Supplies
3.2 RFD-200 S2 Current Source and Voltage Sources
Three current source terminals (100A, 40A, 10A) are available on the RFD-200 S2 front
panel. Output current is displayed on the LCD when the “RFD-200 CURRENT” LED is
lit. Use “METER SELECT” switch to select whether to display current generated by the
RFD-200 S2 or the current input at the “EXT INPUT CURRENT” terminals.
Figure 3 RFD-200-S2 Current and Voltage Sources
One isolated 0-250Vac and one isolated 0-300Vdc voltage sources are also available
along with the three current sources. Both the current and voltage sources are controlled
by the Output Control knob (see Figure 4).

Operating Procedures RFD-200 S2™
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3.3 RFD-200 S2 Control Switches
The RFD-200 S2 control switches and voltage and current source control knob are shown
in figure 4. The Voltage and current sources are controlled by the up (?) and down (?)
switches. There are four control settings for the voltage/current sources:
?START-ON: When this mode is selected, the RFD-200 S2 will turn on the
voltage/current sources and start the timer.
?OFF: When this mode is selected, the voltage/current sources are turned off
and the timer will be stopped.
?ON: The voltage/Current sources are turned on. This mode is used to set the
voltage or current sources. The voltage and current sources will remain on
until turned off by the user.
?START-OFF: When this mode is selected, the RFD-200 S2 will turn off the
voltage/current sources and start the timer
The selected test mode is indicated by a lit LED.
Voltage and current source settings are controlled by the OUTPUT CONTROL knob.
Figure 4 RFD-200 S2 Control Mode Switches
The Test Complete LED will flash to indicate that the START-ON or START-OFF test
has completed.
Press and hold the CONTRAST switch to change the RFD-200 S2 LCD contrast. The
LDC contrast will cycle between light and dark contrast.

Operating Procedures RFD-200 S2™
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3.4 Timer Start and Timer Stop Inputs
The RFD-200 S2 built-in timer displays the test results in both millisecond and cycles.
There are 3 selections for the Timer Start Input:
Internal: Timer starts when voltage/current sources are turned on or off (user
select Start-On mode or Start-Off mode).
Dry: A change in state of a dry contact input after the user has selected the Start-
On mode or Start-Off mode will start timer.
Wet: A change in state of a wet contact input after the user has selected the Start-
On mode or Start-Off mode will start timer.
There are 3 selections for the Timer Stop input:
Internal: Timer stops when user selects OFF Mode.
Dry: A change in state of a dry contact input after the timer has started.
Wet: A change in state of a wet contact input after the timer has started.
Figure 5 Timer Start and Stop Inputs
Note:
1. Voltage level from 24 to 255Vac/dc is considered as voltage “ON” status. Voltages less
than 5Vac/dc is considered as “OFF” status. This input is not polarity sensitive.
2. Dry contact input detect contact closed (shorted) or contact opened.

Operating Procedures RFD-200 S2™
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3.5 RFD-200 S2 Power Resistors
Five power resistor connections are available on the RFD-200 S2 front panel. By
connecting one or more resistors in series with the current source, the users can achieve a
finer control of the current output from the current source.
Figure 6 Power Resistor Array
3.6 RFD-200 S2 External Voltage Input
One external voltage input is available on the RFD-200 S2. Maximum voltage input is
600V.
Figure 7 External Voltage input
3.7 RFD-200 S2 External Current Input
One external current input is available on the RFD-200 S2. The maximum current input
is 6A.
Figure 8 External Current Input

Operating Procedures RFD-200 S2™
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4.0 RFD-200 S2 Application
4.1 Setting Voltage or Current source
Note
In the following instruction steps, all references to panel controls,
indicators and terminals will be exactly as marked on the panel
and are noted in bold capital letters.
Perform the following steps to select and set the voltage or current source.
1. Make sure RFD-200 S2 output is off (OFF LED on the test mode is on, see figure 4)
2. Connect the device under test (DUT) to a voltage or current output of the RFD-200 S2.
2A. If the RDF-200 S2 voltage source is to be used, the user can monitor this voltage
using the RFD-200 S2 External Voltage Input. To monitor this voltage, connect the
RFD-200 S2 voltage source output to the RFD-200 S2’s VOLTAGE INPUT terminals.
3. Turn the OUTPUT CONTROL knob to the zero position (i.e., fully CCW).
4. Select ON in the Control Mode box.
5. Observe that the ON indicator is lit.
6. Turn the OUTPUT CONTROL knob up to desired test voltage or current.
7. Observe the voltage or current setting on the LCD readout.
Note
1. Select OFF in the CONTROL MODE to turn off the voltage/current source.
2. RFD-200 S2 current source output is displayed on the LCD when the “RFD-
200” current LED is lit.

Operating Procedures RFD-200 S2™
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4.2 Set RFD-200 S2 for a Time Delay Test
Perform the following steps to measure an over-current relay time delay.
1. Connect the RFD-200 S2 current source output across the relay coil.
2. Select INTERNAL for timer start. The INTERNAL indicator will light.
3. Connect the TIMER STOP input across the relay dry contact output.
4. Select DRY CONTACT for timer stop. The DRY indicator will light.
5. Set the test current using steps in paragraph 4.1 above.
6. Turn off the current source (by selecting OFF in the Control Box) keeping the same
current setting.
7. Select START-ON in the control mode.
8. The RFD-200 S2 timer will start when it energizes the coil voltage and will stop when
the relay dry contact changes state.
9. Observe the LCD display and TEST COMPLETE LED are flashing.
10. Observe the time in milliseconds and cycles on the LCD readout.
Figure 9 Typical Over Current Relay Connection

Operating Procedures RFD-200 S2™
12
4.3 Use RFD-200 S2 Timer to Test a Circuit Breaker Response Time
The following steps set the RFD-200 S2 timer to measure the opening time of a circuit
breaker. The timer will start when the RFD-200 S2 detects the voltage being applied to
the circuit breaker trip coil.
The timer will stop when the RFD-200 S2 detects the circuit breaker contact has opened.
1. Connect the TIMER START input to circuit breaker coil terminals.
2. Select WET INPUT in the timer start-box. The WET LED shall light.
3. Connect the TIMER STOP input to the circuit breaker dry contact
4. Select DRY INPUT for the timer stop-box. The DRY LED shall light.
5. Turn the OUTPUT CONTROL knob to zero.
5. Select START-ON in the Control Box.
6. Open the circuit breaker.
7. The RFD-200 S2 timer will start when the circuit breaker coil voltage is detected and
will stop when the circuit breaker contact has opened.
8. Observe the LCD display and TEST COMPLETE LED are flashing.
9. Observe the time in milliseconds and the cycles on the LCD readout.
Figure 10 Typical Circuit Breaker Timing Connection

Operating Procedures RFD-200 S2™
13
4.4 User RFD-200 S2 Timer in the Single Input Mode
The RFD-200 S2 timer can be started and stopped with the START INPUT only. This
feature is handy to measure the time duration of the START INPUT when it changes
states then returns to the previous state. This feature works only with the DRY or WET
(input) option of the START INPUT.
To Select the Single Input Mode, press and hold the START INPUT arrow key for 2
seconds. The display will show “Single Input Mode”.
Use the following steps to measure the time a relay contact remains opened.
1. Press and hold the TIMER START key for 2 seconds to select “Single Input Mode”.
2. Observe the “SINGLE INPUT MODE” is displayed on the RFD-200 S2 LCD.
3. Connect the TIMER START inputs to the relay as NC contact.
4. Select DRY INPUT in TIMER START timer control box.
5. Select START-ON in the Control Box.
6. Energize the relay coil to open the NC contact. Observe the RFD-200 S2 timer has
started counting.
7. De-energize the relay coil to close the relay contact. Observe the RFD-200 S2 timer
has stopped counting.
Note
Press and hold the TIMER START key for 2 seconds to return the RFD-200 S2 timer to
dual input mode.

Operating Procedures RFD-200 S2™
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4.5 Use RFD-200 S2 to Plot a Current Transformer Excitation Curve
The following steps to find the excitation curves of a CT.
1. Connect RFD-200 S2 AC voltage source to the CT secondary winding in series with
the External Current Input (see Figure 11).
2. Connect the RFD-200 S2 AC voltage source to the RFD-200 S2 external voltage
meter.
3. Select ON in the RFD-200 S2 Control box.
4. Slowly raise the AC test voltage. Observe and record excitation voltage and current
displayed on the LCD.
5. Continue to raise test voltage and record excitation voltage and current readings.
6. When excitation current reaches saturation (from 1.5A to 2.0A), lower the voltage to
zero.
7. Plot the CT excitation curves using the collected voltage and current reading above.
Figure 11 Typical CT Excitation Test Connection

Operating Procedures RFD-200 S2™
15
4.6 Use RFD-200 S2 to Measure CT primary and Secondary Current
Perform the following steps to set the RFD-200 S2 to measure the primary and secondary
current readings
.
1. Connect the RFD-200 S2 current source through the CT primary current path.
2. Connect CT secondary winding to the RFD-200 S2 External Current Input.
3. Turn on Internal and External current display on RFD-200 S2 by pressing the RFD-
200 S2 Current switch. Internal and external current display is enable when both LEDs
are lit.
4. Select ON in the Control Box.
5. Raise the test current to the desired setting.
6. Observe the primary current and secondary current readings.
7. Turn test current to zero.
8. Select OFF in the Control Box.
Note
CT turns ratio can be calculated using the primary and secondary current readings.
Figure 12 Typical CT Turns Ratio Test Connection

Operating Procedures RFD-200 S2™
1520 S. Hellman Ave., Ontario, CA 91761, USA
Phone [phone] Fax [phone]
www.vanguard-instruments.com
RFD-200 S2 Rev 1 10/ 2006