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What are the applications and features of the GEYA GRI8-IW2 monitoring current relay?
Applications:
The GEYA GRI8-IW2 is used for overcurrent and undercurrent protection of electrical equipment.
Function Features:
• True RMS measurement with high measurement accuracy.
• Overcurrent and undercurrent selection monitoring or simultaneous monitoring.
• The output contact is normally open or normally closed and can be set.
• Two sets of contact outputs, which can act separately and independently.
• 36mm wide, 35mm clamp rail installation.
What does the model name “GRI8-IW” signify for the GEYA GRI8-IW2?
The model name is broken down as follows:
GRI8: GR18 Series
IW: Current isolation monitoring type
The number following IW indicates the monitoring current range:
1: AC/DC 2mA-500mA 50/60Hz
2: AC/DC 0.15A-15A 50/60Hz
What are the technical parameters of the GEYA GRI8-IW2?
| Function | Monitoring current | |
|---|---|---|
| Supply terminals | A1, A2 | |
| Rated supply voltage | AC/DC24-240V 50/60Hz | |
| Monitoring current input terminal | E1, E2, E3, M | |
| Monitoring current range | GRI8-IW1: AC/DC2mA-500mA 50/60Hz | GRI8-IW2: AC/DC0.15A-15A 50/60Hz |
| Rated insulation voltage | 500V | |
| Hysteresis | Only over or under: 5%-50% adjustable; Over and under: fixed 5% | |
| Supply indication | Green LED | |
| Measurement error | <5% | |
| Time delay | 0.3s-30s | |
| Power up delay/Reset time | 1s-20s | |
| knob setting accuracy | 10% | |
| Output | 2xSPDT | |
| Current rating | 5A/AC1 | |
| Switching voltage | 250VAC/24VDC | |
| Min.breaking capacity DC | 500mW | |
| Output indication | Yellow LED | |
| Mechanical life | 5×10^6 | |
| Electrical life(AC1) | 5×10^4 | |
| Operating temperature | -20°C to +55°C (-4°F to 131°F) | |
| Storage temperature | -35°C to +75°C (-22°F to 158°F) | |
| Mounting/DIN rail | Din rail EN/IEC 60715 | |
| Protection degree | IP40 for front panel/IP20 terminals | |
| Operating position | any | |
| Overvoltage cathegory | III. | |
| Pollution degree | 2 | |
| Max.cable size(mm²) | solid wire max.1×2.5or 2×1.5/with sleeve max. 1×2.5 (AWG 12) | |
| Dimensions | 90mmx36mmx70mm | |
| Weight | 100g | |
| Standards | EN/IEC60947-5-1 | |
Can you explain the front panel diagram of the GEYA GRI8-IW2?
The front panel of the GEYA GRI8-IW2 consists of several indicators and adjustment knobs:
• Power up indication: A green LED labeled ‘Un/Rst’ indicates that the device is powered on.
• Over/under indication: An LED labeled ‘F’ flashes or stays on to indicate a fault condition (over or under current).
• Relay 1 indication: An LED labeled ‘R1’ indicates the status of the first relay.
• Relay 2 indication: An LED labeled ‘R2’ indicates the status of the second relay.
• Work mode setting: A set of 5 DIP switches (SW1-SW5) to configure the operating mode.
• Over threshold setting (I>): A knob to set the overcurrent trip point.
• Under threshold setting (I<): A knob to set the undercurrent trip point.
• Time delay setting (Tt): A knob to set the tripping delay time after a fault is detected.
• Power up delay setting (Ti): A knob to set the delay time after power-up before monitoring begins.
• Hysteresis setting (H): A knob to set the hysteresis percentage for resetting after a fault.
How are the DIP switches configured on the GEYA GRI8-IW2?
The function of the GEYA GRI8-IW2 is set using the 5 DIP switches on the front panel as described in the table below:
| Switch | ON | OFF |
|---|---|---|
| SW1 | Over or under (Select one mode with SW2) | Over and under (Simultaneous monitoring) |
| SW2 | Only over (Valid when SW1=ON) | Only under (Valid when SW1=ON) |
| SW3 | Locking after over/under protection | Auto-reset after over/under protection |
| SW4 | 11-14/21-14 Normal closed | 11-14/21-14 Normal open |
| SW5 | Relay 1 and relay 2 operate simultaneously (This mode is defaulted when SW1=ON) | Relay 1 and relay 2 operate separately (Valid when SW1=OFF, R1(11,12,14)-Over, R2(21,22,24)-Under) |
What are the input ranges and specifications for the GEYA GRI8-IW2?
The GEYA GRI8-IW2 has different input terminals for various current ranges. Please refer to the table below for specifications corresponding to your model.
| Model | Input terminal | Input monitoring current range | Input resistance | Overload capacity |
|---|---|---|---|---|
| GRI8-IW1 | E1-M | AC/DC2mA-20mA 50/60Hz | 5Ω | Continuous input at 120% of maximum input. 1s at 150% |
| E2-M | AC/DC10mA-100mA 50/60Hz | 1Ω | ||
| E3-M | AC/DC50mA-500mA 50/60Hz | 0.2Ω | ||
| GRI8-IW2 | E1-M | AC/DC0.15A-1.5A 50/60Hz | 0.05Ω | |
| E2-M | AC/DC0.5A-5A 50/60Hz | 0.015Ω | ||
| E3-M | AC/DC1.5A-15A 50/60Hz | 0.005Ω |
What happens if there is an error in setting the over and under thresholds on the GEYA GRI8-IW2?
When operating in the “Over and under” mode, if you incorrectly set the undercurrent threshold (I<) to a value greater than the overcurrent threshold (I>), the GEYA GRI8-IW2 will indicate an error.
The “Un/Rst” and “F” indicator lights will flash simultaneously, and the relay contacts will be reset to their default state. To clear the error, adjust the knobs so that the under setting value is less than the over setting value. The indicator lights and the relay will then be restored to normal operation.
How does the GEYA GRI8-IW2 operate in ‘Only Over’ current monitoring mode with ‘Auto-reset’?
To set this mode, configure the DIP switches as follows: SW1=ON, SW2=ON, SW3=OFF.
In this configuration, after the initial power-up delay (Ti), the device monitors the current. If the measured current exceeds the ‘Over threshold’ (I>) setting, the ‘F’ LED (Over Alarm) will flash for the duration of the tripping delay (Tt). After the delay, the ‘F’ LED will become solid, the R1 and R2 LEDs will turn on, and both relays will activate.
The relays will remain activated until the measured current drops below the ‘Over threshold’ minus the set hysteresis (H). At this point, the LEDs will turn off and the relays will automatically reset to their normal position.
How does the GEYA GRI8-IW2 operate in ‘Only Under’ current monitoring mode with ‘Lock’ enabled?
To set this mode, configure the DIP switches as follows: SW1=ON, SW2=OFF, SW3=ON.
After the power-up delay (Ti), the device monitors the current. If the measured current drops below the ‘Under threshold’ (I<) setting, the 'F' LED (Under Alarm) will flash during the tripping delay (Tt). After the delay, the 'F' LED will become solid, the R1 and R2 LEDs will turn on, and both relays will activate.
Because ‘Lock’ mode is enabled, the relays will remain in their activated (fault) state even if the current returns to a normal level (above the ‘Under threshold’ plus hysteresis). To reset the device and the relays, the power supply must be turned off and then on again.
How does the GEYA GRI8-IW2 function in ‘Over and Under’ mode with separate relay operation?
To set this mode, configure the DIP switches as follows: SW1=OFF, SW5=OFF. You can choose either Auto-reset (SW3=OFF) or Lock (SW3=ON).
In this mode, Relay 1 monitors for overcurrent, and Relay 2 monitors for undercurrent independently.
• Overcurrent Event: If the current exceeds the ‘Over threshold’ (I>), the ‘F’ LED for Over Alarm (I>) will flash for the tripping delay (Tt), then turn solid. The R1 LED will turn on, and Relay 1 will activate.
• Undercurrent Event: If the current drops below the ‘Under threshold’ (I<), the 'F' LED for Under Alarm (I<) will flash for the tripping delay (Tt), then turn solid. The R2 LED will turn on, and Relay 2 will activate.
The relays operate separately, meaning an overcurrent event only affects Relay 1, and an undercurrent event only affects Relay 2.
What are the dimensions of the GEYA GRI8-IW2?
The dimensions of the GEYA GRI8-IW2 are:
• Height: 90 mm
• Width: 36 mm (maximum)
• Depth: 70 mm
The diameter for mounting screws is 4.2 mm.
How should the GEYA GRI8-IW2 be wired?
Follow the wiring diagram for proper connection:
• Power Supply (Un): Connect the AC/DC 24V-240V power supply to terminals A1 and A2.
• Current Monitoring Input: Connect the circuit to be monitored to the appropriate input terminals based on the expected current range: E1-M, E2-M, or E3-M.
• Relay 1 Output: The load for Relay 1 is connected to terminals 11 (Common), 12 (Normally Closed), and 14 (Normally Open).
• Relay 2 Output: The load for Relay 2 is connected to terminals 21 (Common), 22 (Normally Closed), and 24 (Normally Open).
What is the proper disposal procedure for the GEYA GRI8-IW2?
All electrical waste, including the GEYA GRI8-IW2, should be disposed of in compliance with current WEEE (Waste Electrical and Electronic Equipment) regulations.
What is the safety caution for installing the GEYA GRI8-IW2?
The GEYA GRI8-IW2 must be installed by qualified electricians. All and any electrical connections of the product shall comply with the appropriate safety standards.
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