Megger DC Data sheet
5 and 15 kV DC Dielectric Test Sets
5 and 15 kV DC Dielectric Test Sets
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Continuously variable test voltage
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Rugged field construction
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Compact and portable
15 kV model
DESCRIPTION
Dielectric test sets measure leakage current while applying a
dc voltage at or above the insulation system’s operating level.
This measurement aids in determining the insulation system’s
ability to withstand overvoltages such as lightning strikes and
switching surges.
APPLICATIONS
Megger portable dc dielectric test sets check the electrical
insulation quality of motors, power cables, switchgear, insulators, transformers and capacitors. Typical applications include
acceptance and maintenance testing of critical equipment
used by electrical utility substations and industrial plant distribution systems. Power apparatus manufacturers may also use
the equipment to perform QA/QC production tests.
The test sets can be used to perform step-voltage and proof
tests which, when incorporated into a routine maintenance
program, can aid in predicting potential failure before breakdown occurs.
Two models are available; a 5-kV unit for testing equipment
rated 2.5 kV and below, and a 15-kV model for use on equipment rated 7.5 kV and below. Both are suitable for testing
power cable, switchgear and rotating machinery in accordance with IEEE, ICEA, NEMA and ANSI guidelines.
Because Megger dc dielectric test sets act like full-wave rectified units, they also are suitable for applications involving
vacuum bottles.
DC vs AC High-Potential Testing
Direct current high-potential testing provides several advan-
tages over alternating current. Direct current test equipment
uses far less power, provides fast charging of highly capacitive
test samples, can be easily transported to the test site and
costs less. Additionally, the dc test can detect incipient breakdown without the possibility of damage to good insulation.
FEATURES AND BENEFITS
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Compact and portable
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Air insulated, uses no oil
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±2% accuracy
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Leakage current measurement as low as 0.1 mA
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Continuously variable test voltage with zero-start safety
interlock
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Fast charging of high-capacitance samples
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Current guard circuit for highly accurate measurements
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Strip chart recorder for hard copies (optionally available)
Safety and Reliability
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Input and output line circuit breaker
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Output current overload relay
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Zero-start interlock for high-voltage output
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Switch control and indicating lights for high-voltage ON/
OFF on the 15-kV model
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Full circuit breaker protection
SPECIFICATIONS
Input
120 Vac, 50/60 Hz
Output
Cat. No. 220005
Voltage (maximum): 0 to 5 kVdc,
negative with respect to ground
Current (maximum): 5 mA continuous
Metering
Kilovoltmeter: 4-in. (102-mm) taut band with two ranges, 0 to 2.5 and
0 to 5 kV
Current Meter: 4-in. (102-mm) taut band with four ranges, 0 to
5/50/500 µA and 5 mA
Cat. No. 220015
Voltage: 0 to 15 kVdc, negative with respect to ground
Current: 2 mA continuous
Short Circuit: 12 mA max., limited by circuit breaker
Metering
Kilovoltmeter: 4-in. (102-mm) taut band with two ranges, 0 to 7.5 and
0 to 15.0 kV
Current Meter: 4-in. (102-mm) taut band with four ranges, 0 to
5/50/500 µA and 5 mA
Accuracy
±2% of full scale
Temperature Range
0 to 122° F (–17.7 to +50° C) operating
5 and 15 kV DC Dielectric Test Sets
5 kV model
CAT. NO.
220005
220015
Model
5 kV
15 kV
Test Voltage
Range*
0 to 2.5 kVdc
0 to 5 kVdc
0 to 7.5 kVdc
0 to 15 kVdc
Max. Power
System Voltage
2.5 kVac
(phase-to-phase)
7.5 kVac
(phase-to-phase)
* Negative polarity with respect to ground
ORDERING INFORMATION
Item (Qty) Cat. No.
DC Dielectric Test Sets
5 kV 220005
15 kV 220015
Included Accessories
Ground connection cable, 10 ft [3 m] 4702
kV/MΩ test record graph paper (100-sheet pad) 220000
Power cord, Cat. No. 220015 17032
Instruction manual, Cat. No. 220005 AVTM22-5JB
Instruction manual, Cat. No. 220015 AVTM22-15JA
Output Current
(120-Vac input)
5 mA continuous
5 mA for 12 min;
2 mA continuous
Dimensions
9.4 H x 13.5 W x 10 D in.
24.8 H x 34.3 W x 25.4 D cm
12 H x 20.5 W x 13 D in.
30.5 H x 52 W x 33 D cm
Weight
20.5 lb
(9.3 kg)
35.2 lb
(16 kg)
Item Cat. No.
Optional Accessories
High-voltage resistance discharge stick 222070-62
Internal voltage stabilizer, Cat. No. 220015 only Add –50
Special cable lengths Add –56
“The Lowdown on High-Voltage DC Testing” AVTM22P-1
UK
Archcliffe Road, Dover
CT17 9EN England
T (0) 1 304 502101
F (0) 1 304 207342
UNITED STATES
4271 Bronze Way
Dallas, TX 75237-1019 USA
T 1 800 723 2861
T 1 214 333 3201
F 1 214 331 7399
OTHER TECHNICAL SALES OFFICES
Norristown USA, Toronto
CANADA, Mumbai INDIA, Trappes
FRANCE, Sydney AUSTRALIA,
Madrid SPAIN and The Kingdom
of BAHRAIN.
ISO STATEMENT
Registered to ISO 9001:2000 Reg no. Q 09250
Registered to ISO 14001 Reg no. EMS 61597
5_15KV_DCTS_DS_en_V13
www.megger.com
Megger is a registered trademark
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