Basic Line — voltage and current monitoring relays for LV networks
Country: Germany · Model: Basic Line (BU1DC)
Basic Line is a range of voltage and current monitoring relays for low-voltage installations on a DIN rail per DIN EN 50022. The relays are powered from the monitored circuit, so they need no separate auxiliary supply. They work from −25 to +70 °C.
- Purpose
- monitoring relays for low-voltage installations
- Mounting
- DIN rail per DIN EN 50022
- Setting
- HEX or DIP switches on the front panel
- Supply
- from the monitored circuit (no auxiliary supply)
Technical specifications
| Purpose | monitoring relays for low-voltage installations |
|---|---|
| Mounting | DIN rail per DIN EN 50022 |
| Setting | HEX or DIP switches on the front panel |
| Supply | from the monitored circuit (no auxiliary supply) |
| BU1DC example | monitoring of U> and U< of DC voltage, separate setpoints, common delay and hysteresis |
| Temperature | −25…+70 °C |
| Indication | LEDs and output relays |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The relays are based on a precise microcontroller. Setpoints are set with HEX or DIP switches on the front panel, without a laptop or software, which shortens commissioning. The status is shown by LEDs and output relays, so a fault is visible at once. Sealable plastic covers protect the settings from tampering. As an example, the BU1DC relay monitors the rise (U>) and drop (U<) of DC voltage; its trip setpoints are separate, and the time delay (t) is common. The hysteresis (DIFF) is adjustable. Such relays are installed on storage batteries and DC auxiliary buses, and in the supply circuits of control systems. Detailed characteristics of each relay are available in the product configurator.
How to choose
First determine what exactly you are monitoring — DC or AC voltage, current — and whether you need separate setpoints for rise and drop. For monitoring storage batteries and DC auxiliary buses, the BU1DC is suitable, which has both setpoints U> and U<. If the circuit has to be monitored without an additional source, choose a relay powered from the monitored circuit. Before ordering, check the exact ranges and the number of output contacts in the configurator, because this description gives only the general parameters of the range.
Request a price and lead time
Basic Line — voltage and current monitoring relays for LV networks. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How do you set up a Basic Line relay?
The setpoints are set with HEX or DIP switches on the front panel. No separate programmer is needed.
Is a separate supply needed for the relay?
No, the relay is powered from the monitored circuit. No auxiliary voltage is needed.
What does the BU1DC relay monitor?
It monitors the rise (U>) and drop (U<) of DC voltage with separate setpoints. The time delay is common, and the hysteresis is adjustable.
How are the relays of this range mounted?
They are fixed on a DIN rail per DIN EN 50022. The covers can be sealed, so the settings are protected from changes.
In what temperature range do the relays work?
The operating range is from −25 to +70 °C. This is enough for unheated cabinets and switchboard rooms.
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