Tense GKE-40 - User Manual

OVER & UNDER VOLTAGE PROTECTION RELAY (40A)
GKE-40
GKE-40 over and undervoltage protection relay is designed to protect devices with sensitive operating
voltage values from errors that may arise from mains voltage.
It is suitable to use for loads up to a maximum of 40A.
Make the connections of the device according to the connection type. Otherwise, the device may be damaged. Adjust
the high and low voltage settings of the device according to the operating voltage values of the load you will use.
When the device is energized; If the mains (input) voltage value is between the high voltage and low voltage set
values set on the device, the device energizes the relay, if not, the device does not energize the relay and the error
led turn on, the mains (input) voltage value shown on the display flashes throughout the error.
Error state; If the mains (input) voltage value is between the high and low voltage set values (when the device is
not in error), the mains (input) voltage value rises above the high voltage set value or falls below the low voltage
set value; the device waits for the set error waiting time, then the device de-energizes the relay, the error led turn
on, the mains (input) voltage value shown on the display flashes throughout the error.
The state of getting out of error; When the mains (input) voltage value is not between the high and low voltage
set values (when the device is in high or low voltage error), when the mains (input) voltage value returns to
normal (when the reaches a value between the high and low voltage set values); the device waits for the set error
waiting time, then the device energizes the relay, the error led turns off, the mains (input) voltage value on the
display lights steadily.
ERR
Adjustable Over&Under Voltage Relay (40A)
GKE-40
SET
TIME UP DOWN
7
6
1 2 3
4
5
1 - SET Button: This button is used to save after
setting/changing high/low voltage setting values a nd
error wait time.
2 - TIME button: To set the error waiting time, this
button is pressed for 1 second, then the error waiting
time saved on the device is displayed on the screen.
While the error wait time value is displayed on the
screen, the desired value is set by using the UP /
DOWN buttons. The set value is saved by pressing the
SET button.
3 - UP button: To set the high voltage set value, this
button is pressed for 1 second, then the high voltage
set value saved in the device is displayed on the
screen. While the high voltage setting value is
displayed on the screen, the desired value is adjusted
by using the UP / DOWN buttons. The set value is
saved by pressing the SET button.
4 - DOWN button: To set the undervoltage set value, this button is pressed for 1 second, then the undervoltage
set value saved in the device is displayed. While the undervoltage set value is displayed on the screen, the desired
value can be set by using the UP / DOWN buttons. The set value is saved by pressing the SET button.
5 - Display Group: During normal operation, the input (mains) voltage value is displayed here, the screen lights up
steadily when not in error state, the display flashes in case of error (high or low voltage). During programming,
the value of the relevant program is shown on the display (high, low voltage and error wait setting values).
6 - Setting led: While the high, low voltage setting values a nd error wait times are adjusted by the user, this led
will flash. Ex .: Setting LED flashes while changing the setting by applying the explanations in items 1, 2, 3 and 4.
7 - Error led: In case of high or low voltage error, this led turn on.
Display and Buttons
General
Device Usage and Principle of Operation
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Summary

General

Device Usage and Principle of Operation

Explains connection, adjustment, and operational states (energized, error, out of error).

Display and Buttons

Describes the display elements (display group, LEDs) and the function of each button (SET, TIME, UP, DOWN).

Setting Up the Device

Setting the High Voltage Value

Details how to set the high voltage value using the UP button and SET button.

Setting the Low Voltage Value

Details how to set the low voltage value using the DOWN button and SET button.

Setting the Error Wait Time Value

Details how to set the error wait time using the TIME button and UP/DOWN buttons.

Adjusting the Screen Brightness

Details how to adjust screen brightness using the SET button and UP/DOWN buttons.

Connection Diagram

Technical Specifications

Overview

1. Function Description
2. Usage Features
3. Connection and Installation
4. Setting High Voltage Threshold
5. Setting Low Voltage Threshold
6. Setting Error Wait Time
7. Adjusting Screen Brightness
8. Display Indications
9. Maintenance Features
10. Self-Monitoring and Error Indication
11. Parameter Retention
12. Durability and Environmental Resilience

The GKE-40 Over & Under Voltage Protection Relay is a sophisticated device engineered to safeguard electrical equipment from the detrimental effects of mains voltage fluctuations. It is designed to protect devices that operate within sensitive voltage parameters, ensuring their longevity and reliable performance. This relay is suitable for use with loads drawing up to a maximum of 40A, making it versatile for a range of applications in both residential and industrial settings.

Function Description

The primary function of the GKE-40 is to continuously monitor the mains (input) voltage. It operates by comparing the real-time voltage against user-defined high and low voltage thresholds. When the mains voltage remains within these acceptable limits, the device's internal relay is energized, allowing power to flow normally to the connected load. This ensures that the protected equipment receives a stable and safe voltage supply.

In the event of a voltage anomaly, the GKE-40 initiates a protective sequence. If the mains voltage either rises above the set high voltage limit or drops below the set low voltage limit, the device identifies this as an error state. To prevent immediate and potentially damaging disconnections due to transient fluctuations, the relay incorporates a configurable error waiting time. During this waiting period, the device continues to monitor the voltage. If the voltage remains outside the safe thresholds after the error waiting time has elapsed, the GKE-40 de-energizes its internal relay, effectively cutting off power to the protected load. Concurrently, an error LED illuminates, and the voltage value displayed on the screen flashes, providing a clear visual indication of the fault.

The device is also designed for intelligent recovery. When the mains voltage returns to within the acceptable high and low voltage thresholds after an error state, the GKE-40 again observes a set error waiting time. This delay prevents rapid cycling of the relay if the voltage briefly returns to normal before fluctuating again. Once the voltage stabilizes within the safe range for the duration of the error waiting time, the device re-energizes the relay, restoring power to the load. The error LED then turns off, and the display shows the mains voltage steadily, indicating normal operation has resumed.

Usage Features

The GKE-40 is designed for user-friendly operation and configuration, allowing for precise customization to suit various protection requirements.

Connection and Installation:

The device requires proper connection to the mains supply. The neutral and phase connections from the mains must be wired to the "N" and "L" terminals at the IN part of the device. Similarly, the neutral and phase connections for the equipment to be protected are taken from the "N" and "L" terminals at the OUT part of the device. Incorrect wiring can lead to device damage, emphasizing the importance of following the connection diagram accurately. The device is designed for mounting on a DIN rail, ensuring easy integration into existing electrical panels.

Setting High Voltage Threshold:

To set the upper voltage limit, the "UP" button is pressed for one second. The program LED will flash, and the currently stored high voltage value will be displayed. Users can then adjust this value using the "UP" and "DOWN" buttons. Once the desired high voltage threshold is reached, pressing the "SET" button saves the configuration. The program LED will then turn off, and the display will revert to showing the input mains voltage.

Setting Low Voltage Threshold:

Similarly, to set the lower voltage limit, the "DOWN" button is pressed for one second. The program LED will flash, and the current low voltage value will be shown on the screen. The "UP" and "DOWN" buttons allow for adjustment to the desired low voltage threshold. Pressing the "SET" button saves this setting, and the program LED will turn off, returning the display to the input mains voltage.

Setting Error Wait Time:

The error waiting time, which dictates how long the device waits before acting on a voltage anomaly or before restoring power, can be configured by pressing the "TIME" button for one second. The program LED will flash, and the stored error waiting time will be displayed. Users can adjust this duration using the "UP" and "DOWN" buttons. Saving the setting is done by pressing the "SET" button, after which the program LED turns off, and the display shows the input mains voltage.

Adjusting Screen Brightness:

For optimal visibility in different environments, the screen brightness can be adjusted. Pressing the "SET" button for one second activates the brightness adjustment mode. The program LED will flash, and the current screen brightness value will be displayed. The "UP" and "DOWN" buttons allow users to select the desired brightness level. Pressing the "SET" button saves the new brightness setting, and the program LED turns off, with the display returning to show the input mains voltage.

Display Indications:

The device features a 3-digit LED display that provides crucial information about its operational status. During normal operation, the display shows the input (mains) voltage value steadily. In an error state (high or low voltage), the display flashes, and the error LED illuminates, clearly signaling a fault. During programming, the display shows the specific value being adjusted (e.g., high voltage, low voltage, error wait time, or brightness). A dedicated "Setting LED" flashes when any of these parameters are being adjusted, guiding the user through the configuration process.

Maintenance Features

The GKE-40 is designed for robust and reliable operation with minimal maintenance requirements. Its solid-state electronics and durable construction contribute to a long operational life.

Self-Monitoring and Error Indication:

The device continuously monitors its own operational parameters and the input voltage. The clear error LED and flashing display provide immediate visual feedback in case of a voltage anomaly, allowing for quick identification of issues in the power supply rather than within the device itself. This self-monitoring capability reduces the need for manual checks and simplifies troubleshooting.

Parameter Retention:

All user-configured settings, including high and low voltage thresholds, error waiting time, and screen brightness, are stored internally. This ensures that the device retains its protective parameters even after power interruptions, eliminating the need for re-configuration after a power outage.

Durability and Environmental Resilience:

The GKE-40 is built to operate within a specified temperature range and at certain altitudes, indicating its design for resilience in various environmental conditions. Its robust construction minimizes the risk of physical damage and internal component failure, contributing to its low maintenance profile.

In summary, the GKE-40 is a reliable and user-configurable over and under voltage protection relay that offers comprehensive safeguarding for sensitive electrical equipment. Its intuitive interface, clear display, and robust design make it an effective solution for maintaining stable power conditions and extending the lifespan of connected loads.

Tense GKE-40 Specifications

General

Rated Voltage	250VAC/30VDC
Frequency	50/60 Hz
Weight	Approx. 10g
Contact Form	SPDT
Contact Rating	10A @ 250VAC / 10A @ 30VDC
Operating Temperature	+70°C
Mounting	PCB
Coil Voltage	5V, 6V, 9V, 12V, 24V DC
Release Time	5ms max
Insulation Resistance	100 MΩ (min) at 500VDC
Ambient Temperature	+70°C
Dielectric Strength	1500VAC, 1 minute (between coil and contacts); 750VAC, 1 minute (between open contacts)