Product introduction

NASGQ series Digital Display Clamp-on Phase Meter is special designed for voltage, current and phase tests, it is in high-precision, low price, portable hand-held, dual-channel input measuring. It's easy to measure the phase between U-U, I-I and U-I, identify the inductive circuit ,capacitive circuit and the phase sequence of three-phase voltage, detect the wiring group of transformer, test the secondary circuit and bus differential protection system, display the phase relationship among the CT groups of a differential protection system, and check if the wire of electric meter was correctly connected. When testing customers do not need cut off the tested current which input by slip core current transformer. When measuring the phase between U1 and U2, the two input circuit loop are completely isolated, so the possible miss connection is absolutely avoided, which may result in short circuit and may even burn the meter. The monitor of the device is high-contrast LCD screen, and the character in which could be as high as 25mm, and can be freely rotated approximately 70 °, which helps to obtain the best visual effects.

The shell of the device is made of engineering insulating material, together with a rubber–made anti-vibration protection kits for safety and reliability.

Also called name

Phase meter, clamp phase meter, digital clamp phase meter

The Characteristics of the products

1. Withstand Voltage

Parts between voltage input terminal and meter shell, parts between the iron core of the clamp-current transformer and secondary windings can stand 1000V/50Hz. Parts between the two voltage input terminals can stand Sinusoidal AC Voltage 500V/50Hz for 1min when testing.

2. Insulation Resistance

Between meter circuit and meter shell, between the two voltage input terminals:≥10MΩ

The parameters of the products

1. Intrinsic Error

1.1 Reference Operating Conditions

(1) Temperature: (23±5)℃

(2) Humidity: (45~75)% RH

(3) Wave forms of measured signal: sine wave β=0.02

(4) Frequency of measured signal: (50±0.2)Hz

(5) Position of Measured current carrying conductor in the nipper jaw: Optional position

(6) Amplitude range of measured signal when measuring phase: 100~220V, 0.5A~1.5A

(7) External reference frequency electromagnetic interference: Should be avoided

1.2 The limits of intrinsic error

2. Operating error

2.1 Rated Operating Conditions

(1) Temperature (0~40)℃

(2) Humidity: (20~80)% RH

(3) Wave forms of measured signal: sine wave β=0.05

(4) Frequency of measured signal: (50±0.5)Hz

(5) Position of Measured current carrying conductor in the nipper jaw: Optional position.

(6) Amplitude range of measured signal when measuring phase,

    Phase U1-U2: 30V~500V

    Phase I1-I2: 10mA~10.00A

    Phase U1-I2 or I1-U2: 10V~500V, 10mA~10.00A

(7) External reference frequency electromagnetic interference: should be avoided

2.2 Limits of rated operating error

   Under the conditions described in 1, the limits of rated operating error will not exceed twice of the limits of intrinsic error.

3. Other technical parameters:

(1) Display: three and half digital

(2) Sampling rate: 3 times/ seconds

(3) Power supply: single laminated batteries with 9V, the current of power supply is less than 5 mA.

(4)Dimension:

The size of the shell of meter: 192mm×95mm×55mm

The size of the shell of clamp: 140mm×42mm×20mm

The size of jaws: Φ7mm×9mm

(5)Weight:

The weight of meter: 280g

The weight of clamp: 2×200g

(6)the conditions of storage:

Temperature: -10℃~ 50℃