RZR®-SZZ
Automatic machine RZR®-SZZ is a microprocessor unit for automatic turning on of reserve power supply (ATR/SZR) and automatic return to basic power supply (ARB/APZ) of a switching station 0.4 kV.
Application
Automatic machine RZR®-SZZ ensures constant power supply in networks n/n in public buildings, apartment buildings and industrial establishments. The unit is adopted for operation in a configuration 2 – switches (contactors *), 1 section and 2 power sources.
The unit performs switchings:
• ATR – from AC dump,
• ARB – after voltage return,
• APT – automatic power turning on after unit activation.
Characteristic features
• Manufactured with use of a modern microprocessor RISC type.
• Small dimensions.
• Comfortable and simple maintenance.
• Low power consumption.
• High resistance to interferences in input and output circuits.
• Provided with additional indication of position of switches.
It is possible to:
- set a delay of turning on and off the switches
- have a direct control of commutation elements (switches, contactors),
- monitor switching station status (switches and voltages) by means of LED display,
- block the unit through external contact and key lock,
- change the delay range of turning off and turning on by manufacturer.
Operation
Automatic machine RZR®-SZZ controls the occurrence of two voltages and status of 2 switches. Depending on switch position and voltage occurrence the unit carries out switching procedure which leads to the condition according to the diagram below:
Structure
The automatic unit is located in a PVC housing adopted for mounting on a DIN rail.
The front plate of the unit contains:
• key lock for unit blocking,
• indicator showing the presence of a power supply voltage,
• blocking indicator,
• turning knob for adjustment of turning off and on of switches.
The upper and lower part of the housing has outlets to connect the unit with a controlled system. The housing contains the following main components of the unit:
• power supply,
• output relays,
• separator systems,
• front plate block (signal lights),
• microprocessor system for measurement and control with adjustment of function delay.
Download a catalogue| Basic technical data | ||
| Three-phase measurement rated voltage Un | 400 V AC, 50 Hz | |
| Rated power voltage Uz | AC 230 V
+ 10%, - 20% |
|
| Threshold voltage of controlled phases | 180 V AC ± 10% | |
| Range of adjustment of boot-time delay | (0,05 ÷ 7,5) s
co 0,5 s |
|
| Duration of output pulses for control of switches | 0,5 s | |
| Deviation of time elements | ≤ 1% | |
| Class of time elements with regard to dispersion | 1 | |
| Additional deviation caused by influence of supply voltage alterations and temperature | ± 1% | |
| Working temperature range | (-5 ÷ +55)°C | |
| Allowable relative humidity | 90%
(without condensation) |
|
| Contact capacity:
• maximum start current • rated current of contact load – in AC1 category – in DC1 category • durable • maximum voltage of contacts AC/DC |
15 A
6 A by 250 V AC 6 A / 24 V DC 6 A 250 V / 300 V |
|
| Rated power consumption | ≤ 10 W | |
| Durability of connection of output relays | > 0,6 x 105 | |
| Dimensions | (160 x 90 x 66) mm | |
| Weight | ok. 1,0 kg | |
| Protection level | IP 40 | |
