Vanguard RFD-200 S2 User Manual

RFD-200 S2

PORTABLE RELAY TEST SET

USER’S MANUAL

Vanguard Instruments Company, Inc.

1520 S. Hellman Ave.
Ontario, California 91761, USA

TEL: [phone]
FAX: [phone]

September 2009

Revision 2

RFD-200 S2 USER’S MANUAL REV 2

SAFETY SUMMARY

FOLLOW EXACT OPERATING PROCEDURES

Any deviation from the procedures described in this User’s Manual may create one or more
safety hazards, may damage the RFD-200 S2, or cause errors in the test results. Vanguard
Instruments Company, Inc. assumes no liability for unsafe or improper use of the RFD-200 S2.

All safety precautions provided in this manual must be observed during all phases of testing
including test preparation, test lead connection, actual testing, and test lead disconnection.

SAFETY WARNINGS AND CAUTIONS

Only trained operators shall use this device. All devices under test shall be off-line and fully
isolated.

DO NOT MODIFY TEST EQUIPMENT

To avoid the risk of introducing additional or unknown hazards, do not install substitute parts or
perform any unauthorized modification to any RFD-200 S2 test unit. To ensure that all designed
safety features are maintained, it is highly recommended that repairs be performed only by
Vanguard Instruments Company factory personnel or by an authorized repair service provider.
Unauthorized modifications can cause safety hazards and will void the manufacturer’s
warranty.

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TABLE OF CONTENTS

CONVENTIONS USED IN THIS DOCUMENT ..................................................................................... 1

1.0 INTRODUCTION .................................................................................................................. .. 2

1.1 General Description and Features ................................................................................... 2

1.2 Furnished Accessories ...................................................................................................... 3

1.3 RFD-200 S2 Technical Specifications ................................................................................ 4

1.4 Controls and Indicators .................................................................................................... 6

2.0 FUNCTIONAL DESCRIPTION ................................................................................................. 8

2.1 RFD-200 S2 Auxiliary Power Supply ................................................................................. 8

2.2 RFD-200 S2 Current and Voltage Sources ........................................................................ 8

2.3 Control Switches .............................................................................................................. 9

2.3.1. Voltage and Current Source Controls ....................................................................... 9

2.3.2. LCD Contrast Control ................................................................................................ 9

2.4 Timer Start and Timer Stop Inputs ................................................................................. 10

2.5 RFD-200 S2 Power Resistors .......................................................................................... 10

2.6 RFD-200 S2 External Voltage Input ................................................................................ 11

2.7 RFD-200 S2 External Current Input ................................................................................ 11

3.0 OPERATING PROCEDURES ................................................................................................. 12

3.1 Setting the Voltage or Current Source ........................................................................... 12

3.2 Setting the RFD-200 S2 for a Time Delay Test ............................................................... 13

3.3 Using the RFD-200 S2’s Timer to Test Circuit Breaker Response Time ......................... 16

3.4 Using the RFD-200 S2’s Timer in Single Input Mode ..................................................... 18

3.5 Using the RFD-200 S2 to Plot a Current Transformer Excitation Curve ........................ 20

3.6 Using the RFD-200 S2 to Measure CT Primary and Secondary Currents ....................... 22

LIST OF TABLES

Table 1. RFD-200 S2 Technical Specifications ................................................................................. 4

Table 2. RFD-200 S2 Output Specifications .................................................................................... 5

Table 3. RFD-200 S2 Timing Accuracy ............................................................................................. 5

Table 4. Functional Descriptions of MCCB-250 Controls and Indicators ........................................ 7

LIST OF FIGURES

Figure 1. RFD-200 S2 Controls and Indicators ................................................................................ 6

Figure 2. Typical Over Current Relay Connection ......................................................................... 15

Figure 3. Typical Circuit Breaker Timing Connection .................................................................... 17

Figure 4. Typical CT Excitation Test Connection ........................................................................... 21

Figure 5. Typical CT Turns Ratio Test Connection ......................................................................... 24

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RFD-200 S2 USER’S MANUAL REV 2

CONVENTIONS USED IN THIS DOCUMENT

This document uses the following conventions:

• A key, switch, input, or knob on the RFD-200 S2 is indicated as [KEY], [SWITCH],

[INPUT], [KNOB]

• RFD-200 S2 LCD screen output is shown as:

0mS 0.0CY
V Mtr: -0.003 V
Int I: 0.080 A
Ext I: -0.001A

• Warning messages are indicated as:

WARNING

• Important notes are indicated as:

.

Warning message

Note details

NOTE

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1.0 INTRODUCTION

1.1 General Description and Features

The RFD-200 S2 is a portable relay test set that delivers performance verification testing of
electromechanical, electronic, and microprocessor-based protective relays in their operating
installations. The RFD-200 S2 is a rugged test set suitable for testing a variety of protection
relays operated in both indoor and outdoor environments. The unit’s ergonomic design and
intuitive control panel layout make it ideal for first-time users who have little or no training.

AC Current Source

An AC current source with three outputs (10A, 40A, and 100A) provides test current to relays.
The current source output can be programmed to synchronize with the RFD-200 S2’s timer.
After a test is completed, the test current is turned off and the current reading is latched and
displayed on the LCD screen. This feature reduces the possibility of overheating the relay coils.

Built-in Power Resistors

The RFD-200 S2 features five built-in power resistors for fine current adjustment.

AC Voltage Source

An AC voltage source is available for testing relays up to 250 Vac. The AC voltage source output
can be programmed to synchronize with the RFD-200 S2’s timer.

DC Voltage Source

A 0 – 300 Vdc voltage source is also available for testing purposes.

Built-in Digital Timer

The RFD-200 S2’s digital timer features independent start and stop trigger inputs designed to
measure the time between event transitions and to display the elapsed time in both
milliseconds and cycles. The RFD-200 S2’s timer has three different trigger input modes –
Internal Trigger, Dry-Contact, or Wet-Contact. In Internal Trigger Mode, the timer can start or
stop by sensing the application or removal of the unit’s voltage or current source. In Dry­Contact Mode, the timer can be triggered by detecting a change in state of the dry-contact
input. Similarly, in Wet-Contact Mode, it can be triggered by detecting a change in state of the
voltage input.

Auxiliary AC/DC Power Supplies

The RFD-200 S2 provides three power supplies (24 Vdc, 124 Vdc and 240 Vac) for powering
solid-state or microprocessor-based relays.

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RFD-200 S2 USER’S MANUAL REV 2

RFD-200 S2 Ampere Meters

The test current is displayed on the unit’s back-lit LCD screen that is viewable in both bright
sunlight and low-light levels. The current measuring range is from 0.00 to 250 A. A second
ampere meter is also available and can be used to read an external current input. The external
current input is rated at 6A max and is protected by a circuit-breaker.

RFD-200 S2 Volt Meter

One volt meter input (0 to 600 V input range) is available on the RFD-200 S2. This input uses the
true RMS for AC measurement method.

1.2 Furnished Accessories

The MCCB-250 comes furnished with the following:

• One power cord

• One set of 8-foot current cables

• One 8-foot timer start cables

• One 8-foot timer stop cables

• One 8-foot voltage cables

• One ground cable

• One cable carrying duffel bag

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1.3 RFD-200 S2 Technical Specifications

Table 1. RFD-200 S2 Technical Specifications

TYPE Portable relay test set

INPUT POWER 100 – 120 Vac or 200 – 240 Vac (factory pre-set), 50/60 Hz

PHYSICAL SPECIFICATIONS Dimensions: 16.8”W x 12.6”H x 12”D (42.7 cm x 32.0 cm x 30.5 cm);

Weight: 35 lbs (15.9 kg)

AMPERE METER INPUT

RANGES

VOLT METER INPUT RANGE 0 – 600.0V; AC accuracy: 1% of reading ±1 count; DC accuracy 0.5% of

AUXILIARY POWER SUPPLIES 24 Vdc @ 1 A, 124 Vdc @ 0.25 A, 240 Vac @ 0.125 A

SAFETY Designed to meet IEC61010 (1995), UL61010A-1, CSA-C22.2 standards

ENVIRONMENT Operating: -10˚C to 50˚ C (15˚F to +122˚ F); Storage: -30˚ C to 70˚ C (-

OPTIONS Transportation case

WARRANTY One year on parts and labor

Internal input range: 0 – 250 A; Accuracy: 2% of reading ± 10 mA,
External AC input range: 0 – 6A; Accuracy: 1% of reading ± 10mA
External DC input range: 0 – 6A; Accuracy: 0.5% of reading ±1 count
Measurement Method: True RMS for AC

reading ±1 count
Measurement Method: True RMS for AC

22˚F to +158˚ F)

The above specifications are valid at nominal operating voltage and at a
temperature of 25°C (77°F). Specifications may change without prior notice.

NOTE

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Table 2. RFD-200 S2 Output Specifications

AC CURRENT OUTPUT

Range No-Load Voltage Load Voltage Load Current Load/Unload Times

10A 90 Vac 75 Vac 10 A 2 min / 15 min

40 A 25 Vac 20 Vac 40 A 1 min / 15 min
100 A 10 Vac 7.25 Vac 100 A 1 min / 15 min
100 A 10 Vac 3 Vac 250 A 1 sec / 5 min

AC VOLTAGE OUTPUT

Range No-Load Voltage Load Voltage Load Current Load/Unload Times

250 Vac 260 Vac 240 Vac 3 A 10 min / 45 min

DC VOLTAGE OUTPUT

Range No-Load Voltage Load Voltage Load Current Load/Unload Times

300 Vdc 300 Vdc 250 Vdc 2A 10 min / 45 min

Table 3. RFD-200 S2 Timing Accuracy

RFD-200 S2 TIMER SECOND DISPLAY

IN SECONDS AND CYCLES (50/60 HZ PROGRAMMABLE)

Range Resolution Accuracy

0 to 9.999 sec 1 ms ± (1 ms + 0.01%)

10.00 to 99.99 sec 10 ms ± (10 ms + 0.01%)

100.00 to 999.999 sec 100 ms ± (100 ms + 0.01%)

TIMER CYCLES DISPLAY

Range Resolution Accuracy

0 to 9.999 cycles 0.1 cycle ± (0.1 cycle + 0.01%)
1,000 to 49,999 cycles / 50 Hz 1 cycle ± (1 cycle + 0.01%)

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1.4 Controls and Indicators

The RFD-200 S2’s controls and indicators are shown in Figure 1. A leader line with an index
number points to each control and indicator, which is cross-referenced to a functional
description in Table 4. The table describes the function of each item on the control panel. The
purpose of the controls and indicators may seem obvious, but users should become familiar
with them before using the RFD-200 S2. Accidental misuse of the controls will usually cause no
serious harm. Users should also be familiar with the safety summary found on the front page of
this User’s Manual.

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Figure 1. RFD-200 S2 Controls and Indicators