High current loop tester
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Product Name : High current loop tester
Product Origin : Hong Kong S.A.R., China
Product Category : Megger
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Contact Details : 運揚有限公司 WANCO LIMITED
Product Code : LT300
Product Details

High current loop tester



高電流環測試儀


Model : LT300

 

The LTW425 of insulation and continuity tester offers those working in electrical engineering, the electrical supply industry and in maintenance, repair and servicing of industrial equipment and manufacturing processes a convenient test instrument.

It is also very useful for the checking of the electrical system in hybrid and electric vehicles. the safety and comfort of a modern purpose designed instrument. 

 

Specification

 

General Specification

Only values with tolerances or limits are guaranteed data. Values

without tolerances are for information only.

Accuracy

All accuracy statements are based on:

Ambient temperature: 23º ± 2ºC

Nominal source voltage: 230 V a.c ± 1%

Voltage measurement

(ac only) 50V to 440 V

Accuracy: ±2% ±1V

Frequency measurement

Range: 25Hz to 99.99Hz

Accuracy: ±0.1Hz

A warning will be shown if applied voltage exceeds 440 V.

Damage will occur if applied voltage exceeds 600 √ rms.

Loop testing

Accuracy

+/-5% +/-0.03 ohms @ 230 V a.c.

+/-10% +/-0.03 ohms @ 100 V a.c. and 300 V a.c. (LTW325 &

 LTW335)

+/-10% +/-0.03 ohms @ 100 V a.c. and 280V (LTW315)

+/-10% +/-0.02 ohms (LTW425)

+/-15% +/-0.03 ohms @ 50 V a.c. (LTW325 & LTW335)

+/-15% +/- 0.03 ohms @ 50 V a.c. (LTW425)

 

NO-TRIP Loop and High current Loop test

Source voltage:

LTW315 100V to 280V (49Hz to 50.1Hz)

LTW325,335 & 425 50V to 440V (49Hz to 50.1Hz)

Display range: 0.01 Ω to 2000 Ω

Accuracy: ±5% ±0.03 Ω

Nominal test current:

No-Trip loop test 15 mA (at nominal 230 V a.c supply)

High current loop test 4 A (at nominal 230 V a.c supply)

EN61557

Operational range: 0.30 Ω to 1000 Ω

High resolution loop test (LTW425 only)

Source voltage: 50 V to 440 V (50Hz)

Display range: 0.001 Ω to 2000 Ω

Accuracy: ±5% ±0.01 Ω

Nominal test current: 4 A at nominal 230 V supply

EN61557

Operational range: 0.30 Ω to 1000 Ω

Prospective Fault Current (PFC)

Prospective fault current = Measured Source Voltage / Loop r

esistance

Maximum range: No trip mode: 20 KA

 High current mode: 20 KA

 Hi resolution mode: 40 KA

Accuracy is derived from loop test and voltage measurement.

Environmental

Temperature and humidity

Operating Range: -10°C to +50°C

Operating Humidity: 90% R.H. non-condensing at

 +40°C max.

Storage Range: -25°C to +70°C

Maximum altitude: 2000m to full safety specification

Dust and water ingress: IP54

Safety

IEC61010

Designed to IEC61010-1

Designed for 300 volts to Earth Category IV, with Phase to Phase

voltages to 440 Volts.

Fuse protected to 600 volts rms ac.

EN61557

Complies with the following parts of EN61557, Electrical safety in

low voltage systems up to 1000V ac and 1500V dc- Equipment for

testing, measuring or monitoring of protective measures:

Part1-General Requirements

Part3-Loop resistance

E.M.C

In accordance with IEC61326-1

Power supply

Battery: 8 x 1,5 V cells IEC LR6 type (AA alkaline).

Rechargeable: 8 x 1.2VNiCd or NiMH cells

Battery life: 2000 consecutive testsNO-TRIP Loop and High current Loop test

Source voltage:

LTW315 100V to 280V (49Hz to 50.1Hz)

LTW325,335 & 425 50V to 440V (49Hz to 50.1Hz)

Display range: 0.01 Ω to 2000 Ω

Accuracy: ±5% ±0.03 Ω

Nominal test current:

No-Trip loop test 15 mA (at nominal 230 V a.c supply)

High current loop test 4 A (at nominal 230 V a.c supply)

EN61557

Operational range: 0.30 Ω to 1000 Ω

High resolution loop test (LTW425 only)

Source voltage: 50 V to 440 V (50Hz)

Display range: 0.001 Ω to 2000 Ω

Accuracy: ±5% ±0.01 Ω

Nominal test current: 4 A at nominal 230 V supply

EN61557

Operational range: 0.30 Ω to 1000 Ω

Prospective Fault Current (PFC)

Prospective fault current = Measured Source Voltage / Loop r

esistance

Maximum range: No trip mode: 20 KA

 High current mode: 20 KA

 Hi resolution mode: 40 KA

Accuracy is derived from loop test and voltage measurement.

Environmental

Temperature and humidity

Operating Range: -10°C to +50°C

Operating Humidity: 90% R.H. non-condensing at

 +40°C max.

Storage Range: -25°C to +70°C

Maximum altitude: 2000m to full safety specification

Dust and water ingress: IP54

Safety

IEC61010

Designed to IEC61010-1

Designed for 300 volts to Earth Category IV, with Phase to Phase

voltages to 440 Volts.

Fuse protected to 600 volts rms ac.

EN61557

Complies with the following parts of EN61557, Electrical safety in

low voltage systems up to 1000V ac and 1500V dc- Equipment for

testing, measuring or monitoring of protective measures:

Part1-General Requirements

Part3-Loop resistance

E.M.C

In accordance with IEC61326-1

Power supply

Battery: 8 x 1,5 V cells IEC LR6 type (AA alkaline).

Rechargeable: 8 x 1.2VNiCd or NiMH cells

Battery life: 2000 consecutive testsNO-TRIP Loop and High current Loop test

Source voltage:

LTW315 100V to 280V (49Hz to 50.1Hz)

LTW325,335 & 425 50V to 440V (49Hz to 50.1Hz)

Display range: 0.01 Ω to 2000 Ω

Accuracy: ±5% ±0.03 Ω

Nominal test current:

No-Trip loop test 15 mA (at nominal 230 V a.c supply)

High current loop test 4 A (at nominal 230 V a.c supply)

EN61557

Operational range: 0.30 Ω to 1000 Ω

High resolution loop test (LTW425 only)

Source voltage: 50 V to 440 V (50Hz)

Display range: 0.001 Ω to 2000 Ω

Accuracy: ±5% ±0.01 Ω

Nominal test current: 4 A at nominal 230 V supply

EN61557

Operational range: 0.30 Ω to 1000 Ω

Prospective Fault Current (PFC)

Prospective fault current = Measured Source Voltage / Loop r

esistance

Maximum range: No trip mode: 20 KA

 High current mode: 20 KA

 Hi resolution mode: 40 KA

Accuracy is derived from loop test and voltage measurement.

Environmental

Temperature and humidity

Operating Range: -10°C to +50°C

Operating Humidity: 90% R.H. non-condensing at

 +40°C max.

Storage Range: -25°C to +70°C

Maximum altitude: 2000m to full safety specification

Dust and water ingress: IP54

Safety

IEC61010

Designed to IEC61010-1

Designed for 300 volts to Earth Category IV, with Phase to Phase

voltages to 440 Volts.

Fuse protected to 600 volts rms ac.

EN61557

Complies with the following parts of EN61557, Electrical safety in

low voltage systems up to 1000V ac and 1500V dc- Equipment for

testing, measuring or monitoring of protective measures:

Part1-General Requirements

Part3-Loop resistance

E.M.C

In accordance with IEC61326-1

Power supply

Battery: 8 x 1,5 V cells IEC LR6 type (AA alkaline).

Rechargeable: 8 x 1.2VNiCd or NiMH cells

Battery life: 2000 consecutive tests

 

Mechanical

Weight: 1000g ±10% excluding test leads

Dimensions: 203 x 148 x 78 mm




Patents

The loop testing technologies used in these instruments are subject

to the following patent applications:

UK Patent no. 0518089.9

European Patent no. 06119110.2

US and Canadian patent application.