Related Manuals for I-Gard GCHK-100
Summary of Contents for I-Gard GCHK-100
- Page 1 MInIng relaY ground fault proteCtIon SYSteM the power to protect Instruction Manual C-407...
- Page 2 Each GCHK-100 relay and its auxiliary parts is carefully inspected before being packed for shipping. The unit should be examined immediately upon receipt. If damage or indication of rough handling is apparent, I-Gard should be notified promptly if replacements for damaged goods are necessary.
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Page 3: Table Of Contents
Figure 5.1 GCHK-DRI Label Figure 5.2 mGARD-SYM Label Figure 6.1 Connection Diagram Figure 11.1 GCHK-100 Main Relay Outline Dimensions (inches) Figure 11.2 mGARD-SYM LCD Remote Indicator Dimensions (inches) Figure 11.3 GCHK-DRI LED Remote Indicator Dimensions (inches) Figure 11.4 GCHK-ZT Zener Diode Line Terminator Outline Dimensions (inches) taBleS Table 2.1 Catalog Numbers... -
Page 4: Introduction
Ground Fault detection requires the use of current sensors, and the GCHK-100 is designed to operate with I-Gard TxA type sensors or a wide variety of sensors with ratios of 1000:1, 600:1 and 40:1 (200:5). The sensors are typically mounted in the substation where the GCHK-100 is installed. Detection of ground faults is important to prevent arcing faults in equipment where electric shock and fire can occur and cause serious equipment and personnel hazards. -
Page 5: Catalog Numbers
Surge protection is built into the relay; please refer to the electrical specifications data for withstand ratings. ZSCS with, or without, built-in protection can be used with the GCHK-100 relay. The terminal block provides a common ground and a terminal location for each of the three sensor types. -
Page 6: Remote Indication
Figure 5.1 shows the faceplate of the GCHK-DRI. This simple indicator extends the 3 red LED’s and yellow push button on the GCHK-100 to a panel or remote location. Press the yellow button once to reset the relay or twice quickly to test (Warning: a test will cause the GCHK-100 to trip). -
Page 7: Installation
Wiring (See Figure 6.1 Connection Diagram) Control Power Control power is required for the GCHK-100 relay. The power may be either AC or DC and between 100 and 250V. A source should be rated at least 5VA in capacity. GCHK-100 Instruction Manual... -
Page 8: Figure 6.1 Connection Diagram
Figure 6.1 Connection Diagram shows the Shunt Trip coil of the protective circuit breaker connected to the NO contacts of the GCHK-100 relay. This is the non-failsafe connection. The NC contacts of the Form Z relay are not used in this case, but would be required in case of failsafe mode of operation. -
Page 9: Setup
No additional wiring is required for the Frame Voltage monitor. Setup The GCHK-100 can be operated in different modes selectable with Switch 1. See Table 7.1 Normal mode is with a non-energized TRIP relay which becomes energized when the trip level is exceeded for a duration exceeding the selected time delay. -
Page 10: Table 7.2 Ground Fault Pickup Settings
For a ground check trip condition only, the GCHK-100 TRIP relay, and its auxiliary relay, may be automatically reset upon the removal of the fault condition without operator intervention. Otherwise all relays are manually reset by pressing the RESET push buttons on the relay or on the remote indicators. -
Page 11: Table 7.3 Ground Fault Trip Delay Settings
196.6 ms 398.3 ms 398.3 ms 10 s 398.3 ms ground Check The ground check trip level can be adjusted using dipswitch 1, switches 4 and 5. Four resistance levels are available as shown in Table 7.5 GCHK-100 Instruction Manual I-GARD... -
Page 12: Table 7.5 Ground Check Settings
To provide a greater degree of operator protection, a voltage sensing function is included in the operation of the GCHK-100 relay to detect if the frame to ground voltage of the mobile equipment has exceeded preset levels. The voltage detection will operate within 100 ms (quicker than the ground check resistance detection) and within 30 ms if the frame voltage exceeds 100V AC. -
Page 13: Maintenance And Testing
Due to the solid state design and the use of sealed components, it is not necessary to service the GCHK-100 other than occasionally dusting with a damp cloth or vacuum cleaner during regular switchboard maintenance. -
Page 14: Service
For assistance in installation, set-up or testing please call I-Gard toll free at the following number. 1-888-737-4787 (1-888-ReSiSTR) There are no recommended, user-serviceable parts in the GCHK-100 other than replacement of the Pilot Wire fuse. This fuse is a 600V rated 0.5A FNQ-½ by Bussman. -
Page 15: Specifications
Toroidal, with window diameter up to 225 mm. Rating: Ratios supported: 10A @ 240V AC, Any I-Gard T type ZSCS (e.g. T2-A, T3-A, T6-A and T9-A) 8A @ 24V DC, 1000:1, 600:1 and 40:1 ½ HP @ 240V AC (Input impedance 50, 50 and 1 ohm respectively.) -
Page 16: Outline Dimensions
5.50 0.20 4.72 0.15 Figure 11.1 GCHK-100 Main Relay Outline Dimensions (inches) I-GARD GCHK-100 Instruction Manual... -
Page 17: Figure 11.2 Mgard-Sym Lcd Remote Indicator Dimensions (Inches)
3.94 0.41 3.94 1.18 0.14 5.16 2.15 Figure 11.2 mGARD-SYM LCD Remote Indicator Dimensions (inches) 1.92 0.61 1.18 0.35 0.26 0.14 0.36 1.50 2.20 1.92 0.61 0.35 0.26 Figure 11.3 GCHK-DRI LED Remote Indicator Dimensions (inches) GCHK-100 Instruction Manual I-GARD... -
Page 18: Figure 11.4 Gchk-Zt Zener Diode Line Terminator Outline Dimensions (Inches)
2.65 Figure 11.4 GCHK-ZT Zener Diode Line Terminator Outline Dimensions (inches) I-GARD GCHK-100 Instruction Manual... -
Page 19: Instruction Manuals
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