DC Separated Net Insulation Monitor WD-ZBMΩ ABS Plastic Shell
Housing
1. Product Introduction:
This type of meters are analog electric measuring instruments,
widely used for measuring AC/DC current, voltage, frequency,
power,power factor, insulation resistance and synchronous
indicating in AC/DC transmitting & distributing power system,
switchboard, other electric & non-electric instruments.
Our 96*96mm & 72*72mm squre meter, and 110*110mm, 80*80mm are round
type meter improved in structure, material, seals according to
environmental conditions & demands in marine industry, which let
our meter have the ability of not only advanced technology,
reasonable structure, good quality, but also good appearance, light
weight, anti-mechanical force and different climate.
2. Technical Specification:
| Item | Technical Data | Standards |
| Technical Standard | GB/T7676-1998 | IEC60092-50 |
| Environmental Standard | GB8355-1987 | IEC92-504-74 |
| Safety Standard | GB4793-20 | IEC61010 |
| Working Temperature | -40-65℃ | |
| Temperature Infulence | -13-33℃, 100% comply with accuracy class | |
| Indicating Angle | 240°-270º (Synchroscope meter: 360º) | |
| Color of Shell | Black/white,board frame, terminal plate: black | |
| Color of Dial Plate | Black/white(other colors are available) | |
| Mounting | Vertical Installation | |
| Dimension | 110*110mm, 80*80mm | |
| 96*96mm, 72*72mm, 48*48mm | |
| Overshoot | Less than 20% when scale reaches to 2/3 | |
| Insulation Withstand | Circuit& shell: AC2600V/1 min(Water area) | |
| Vibration Resistance | 24.5m/s2 | |
| Impact Resistance | 147m/s2 | |
| Material | Shell/terminal board: ABS; Cover: Transparent Glass
|
3. Ordering Code
4. The Installation:
Unless specified, the meter is usually installed in a vertical
position. Other installation positions such as horizontal and
inclined position can be installed according to the customer’s
requirements. The corresponding level of accuracy is only valid to
the regulated installation position. The meter has two kinds of
instruction angles: right angle 90°and wide angle 240°.
5. Accuracy Level:
The WD series of pointer meter: AC and DC voltmeter and ammeter to
the level of 1.5 or 2.5, power meter to the level of 2.5, frequency
meter to the level of 1.5, and power factor meter to the level of
2.5.
6. Using Instructions:
Monitoring the insulation resistance of ungrounded power network.
When insulation resistance is lower than the preset value, alarm
release.
Based on principle method, the net insulation monitor can be
divided into following catagories:
a) . Monitor with measuring system, called integrated net
insulation monitor, can be customized with self-dection function.
Explaination as follows:
"Monitor" mode: Ordinary monitoring, monitor works as normal;
"Suspend" mode: Invalid, monitor does not check with the insulation
resistance of circuit, and pointer come to ∞;
"Test" mode: Self-detection. Monitor does not check with the
insulation resistance of circuit, pointer come to 0, alarm LED lit,
release activated.
b). Monitor and measuring system are separated, called separated
net insulation monitor.
c). Monitor the insulation resistance of two ungrounded power
network at the same time, using integrated double circuit net
insulation monitor.
