For your convenience, we have adapted the printed manuals into a user-friendly web format.
ZUBR voltage monitoring relay web-manuals library:
   •    Basic voltage monitoring relay ZUBR D
   •    Basic with thermal protection ZUBR Dt
   •    With maximum function ZUBR D2
   •    With maximum function plus current and power control ZUBR CV2 [2 screens]
   •    With maximum function plus current and power control ZUBR MF2 [3 screens]
   •    Voltage relay with touch buttons in socket ZUBR SR1
   •    Voltage relay in socket ZUBR R1
   •    Three-phase ZUBR 3F
Each manual includes a description of functions, wiring diagrams, and setup guidance — everything you need for proper installation and use.

Welcome to installation and operation web manual for ZUBR Dt

Voltage monitoring relay
with thermal protection

— Protect electrical equipment from critical mains voltage surges. Equipment sensitive to line voltage deviations: refrigerators, TVs, video and audio equipment, computers, etc. The range includes models for 25, 32, 40, 50, 63 A.

Content

Content

Technical data
Installation
Connection schemes
Exploitation
Possible issues and solutions
Exploitation

Technical data

Technical data

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The number of operating 
cycles under load
100 000 cycles
not less 10 000 cycles
The number of operating 
cycles without load
1 000 000 cycles
not less 500 000 cycles
Relay type
electro-
magnetic
polarized
Current measurement 
accuracy
0,5–63  А ±0,1–0,3 А
Voltage limits
upper 230–280 V,
lower 100–210 V
Switch-off time when
overvoltage occurs
not more than 0,03 sec
Switch-off time when
undervoltage occurs
0,1–10 c  | ≥ 100 V |
not more than 0,03 с  | < 100 V |
Supply voltage
100–420 V
Power consumption
not more than 0,35 kWt / month
Connection
wire cross section not more than 16 mm2
Device weight
0,19 kg ±10%
Overall dimensions
36 х 85 х 66 mm  (w х h х d)
IP to GOST 14254
IP20
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Installation

Installation

The device is intended for indoor installation. Minimize the risk of moisture and liquid ingress at the installation site. The ambient temperature during operation and installation should be between –5...+45 °С.

‍The appliance is installed in a special box, which allows to conduct the easy installation and operation. Cabinet should be equipped with standard mounting rail 35 mm width (DIN rail). The appliance takes in width of 3 standard module on 18 mm. The height of the appliance should be in the range 0,5...1,7 m from the floor.

‍For protection against short circuit and excess capacity in circuit load necessarily need to set in front of the appliance, the automatic circuit-breaker (QF), see schemes 1, 3. To protect person from electric shock 
leak is set safety shutdown device.

‍Terminals of the device designed for wire cross section up to 16 mm². Clean the end wires of 10±0,5 mm. It is advisable to use a soft wire, which is tightened in the terminals with a screwdriver with a tip width of no more than 6 mm with a torque of 2,4 N·m. A screwdriver with a blade more than 6 mm wide can cause mechanical damage to the terminals. Doing so will void your warranty claim.

‍Cutting wires of wiring to which connects voltage relay should meet the value of electric current, which consumes voltage.

‍If the relay power handling exceeds its certified value use the electric contactor (magnetic starter, power relay) which is designed for this power capacity (see scheme 2).

Сonnection schemes

Сonnection schemes

‍Supply voltage (100 – 420 V, 50 Hz) served on terminals 1 and 2, phase (L) is connected to terminal location 2, and the neutral conductor (N) to terminal 1. The connecting wires of the load phases are connected to the terminal 3 and to the neutral terminal block (not included).

‍Important❗️ Before the installation and operation of the device, please read by the end of this document. This will help to avoid possible danger, mistakes, and misunderstandings.

Scheme 1. Option of wiring diagram
Scheme 2. Option of wiring diagram contactor with 220 V winding
Scheme 3. Option of the connection diagram

‍It is forbidden to use voltage relay to protect equipment, which runs from the sources of modified sine, uninterruptible power supply output voltage sinusoid are not Long operation (more than 5 minutes) from the following sources voltage may damage ZUBR and lead to not warranty repair.

‍If a neutral terminal is not used to connect a neutral wire to the device, the connection of the mains neutral wire to the load neutral in terminal 1 of the device is allowed only if it is crimped in the sleeve.

Exploitation

Exploitation

‍When connected and during operation, the thermostat displays the current temperature of the remote sensor. If it is lower than the set temperature, the load is energized. In this case, the indicator lights up red.

‍Use "+" or "–" buttons to change the heating temperature. First, the screen displays the operating mode, then the set temperature of this mode.

If you want to securely protect the settings from children or unauthorized access, press and hold the "+" and "–" simultaneously for 6 seconds until "Loc" appears on the screen, or in case of unlocking, "unLoc" will appear.
The device will immediately begin to display the voltage on phase. If the voltage is normal, the voltage will be applied to the load after the set time and the green indicator will light up. If the voltage is over the upper limit, its value will flash alternately with if over the lower limit, its value will flash alternately with U——, if over the lower limit, its value will flash alternately with U_ _.

Setting voltage limits

(factory setting 242 V and 198 V)
To view the upper limit press "+" button, lower limit press "–" button. To change use "+" and "–" buttons.
Important❗️ During voltage limits settings use technical documentation for protected equipment. All settings are stored in non-volatile memory.

Reset to Factory Settings

Hold the three buttons "–", "+" and "≡" until "dEF" message appears on the screen. After release, reset to factory settings and reboot will take place, the event log is cleared.

Menu button "≡"

Menu button "≡"

Use the "≡" button to navigate through the menu.
Use the "+" and "–" buttons to change the parameters. After pressing the button for the first time the parameter will flash, after pressing it for the second time the parameter will change. After 5 sec after pressing — return to themains voltage display.

1. Log of events for 50 notes

The device stores in non-volatile memory the voltage values at which the load was interrupted or "oht"overheat triggering.
Log entries are displayed in order from the last to the oldest ("n 0" is the last entry, "n49" is the oldest).
To navigate through the general log use the buttons "+" or "–" When viewing the alarm voltage, the relay will briefly display the alarm number after 1 sec.
To reset the log, hold down "≡" while viewing the log for 6 sec until the inscription "rSt." appears. After releasing the button the log will be cleared and the screen will display "---".
2. Time delay before the load is switched on
(factory setting 3 s, a range of change 3–600 s)
To extend the service life of the refrigerating equipment with a compressor, it is recommended to set the delay after an accident to 120–180 sec.
To set the delay, press the menu button twice until “ton” appears on the screen. If a voltage surge occurs, the device will display the maximum voltage for 1,5 seс, then the current voltage for 1,5 sec with a flashing dot in the rightmost digit.
The countdown in seconds ("t99.", "t98.") will start until the load is turned on.
If you set a delay time longer than 
100 sec, the screen will display the current mains voltage with a flashing dot. When the time is less than 99 sec, the countdown to switching on the load is displayed.
3. Pro mode of Switch-off time when undervoltage and overvoltage occurs
(factory setting "oFF")
Activate a Pro mode to reduce the number of outages of modern equipment that works stably under certain voltage deviations. Thus, the use of Pro mode allows you not to turn off the equipment in case of safe in size and duration voltage deviations.
4. Voltage correction
(factory setting 0 V, range of change ±20 V)
You can use correction if voltage indications on the screen 
of the device and your reference device differ.

Possible issues and solutions

Possible issues
and solutions

At turning on neither the indicator nor the screen don't light up

Screen normal voltage level, load is not turning on

The load is disabled, "oht" flashes on the screen

Every 5 sec the screen displays "Ert"

Additional information

Additional information

Firmware version
Hold "≡" for 6 sec. The manufacturer reserves the right to modify the firmware to enhance the device technical characteristics. Print manual ZUBR Dt
version: dtr.82.0.5. / 
d57 / dtr61
Safety instructions
Warranty terms
Print manual
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