SO-54SR-3xx, SO-52v21-AUT, APZ-20 — overhead line disconnector controllers, fault indicators and sectionalizers
SO-54SR-3xx and SO-52v21-AUT controllers automate disconnectors on overhead lines and in MV distribution points, performing the functions of a fault indicator or a sectionalizer. The group also includes APZ-20, an analyzer and indicator of short-circuit current flow. The devices work in FDIR schemes on 15–30 kV overhead lines and in MV secondary substations and switching stations.
- SO-54SR-301
- overhead line disconnectors: fault indicator / sectionalizer, measurement, control, recording; 35 mm DIN rail
- SO-54SR-301 communication
- 2×RS-232, Ethernet 100Base-TX, 2×RS-485 or 1×RS-422, 1-Wire, GPRS/UMTS/LTE modem with two SIMs, TETRA support
- SO-54SR-301 measurement
- 3 voltages (dividers, VTs or sensors), 4 currents (3 phases + 3I0 in the Holmgreen connection)
- Inputs/outputs
- 16 inputs, 4 outputs
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
SO-54SR-301 serves outdoor disconnectors on trunk lines and branches of MV networks, while SO-54SR-321 and other versions of the series are used for indoor disconnectors. The controller works as a short-circuit indicator or a sectionalizer and at the same time measures, controls, maintains communication and records events and faults. It consists of a central processor unit, an analog measurement unit, a discrete input and output unit and a power supply, and is mounted on a 35 mm DIN rail.
The central processor has 2 RS-232 channels, Ethernet 100Base-TX, 2 RS-485 channels or 1 RS-422 channel, a 1-Wire channel, a service RS-232 and a built-in GPRS/UMTS/LTE modem for two SIM cards, so telecontrol is possible in the networks of two operators. The measurement unit accepts 3 voltages through dividers, VTs or voltage sensors depending on the version, as well as 4 currents, that is, 3 phase currents and 3I0 in the Holmgreen connection through current transformers. The discrete signal unit has 16 inputs and 4 control outputs. An external TETRA terminal is connected through a serial port or Ethernet, and the controller supports parallel communication with SCADA over TETRA and GPRS/UMTS/LTE-APN.
SO-52v21-AUT serves indoor and outdoor MV disconnectors and combines measurement, control, telecontrol, the functions of a fault indicator, a sectionalizer and a multichannel fault recorder. In a configuration with mAI-32-31 modules, one controller implements up to three fault indicators or sectionalizers and serves up to ten switching devices. The integrated version with the mCA-01-01 module, that is, a central processor with a 3G modem and analog inputs, is designed for one indicator. It supports Smart Grid and FDIR functions, continuously detects intermittent earth faults as a sign of growing partial discharges, and phase currents can also be measured with Rogowski coils. Data protection is implemented according to PN-EN 62351.
APZ-20 works as an independent indicator of short-circuit currents in MV networks together with FDIR modules. It is installed on poles without disconnectors, for example on line taps, or is added to points with a radio-controlled disconnector that has no short-circuit current detection of its own. The set consists of the SP-1 measuring sensor and an SO-54SR-301 controller in a supervision cabinet with guaranteed supply. The event log has a timestamp with a resolution of 1 ms, and the TEST and KAS buttons on the front panel start a check and reset the indication.
Typical facilities: sectionalizing points of 15–30 kV overhead lines, MV secondary substations and switching stations, schemes of automatic isolation of a faulted section.
Technical specifications
| SO-54SR-301 | overhead line disconnectors: fault indicator / sectionalizer, measurement, control, recording; 35 mm DIN rail |
|---|---|
| SO-54SR-301 communication | 2×RS-232, Ethernet 100Base-TX, 2×RS-485 or 1×RS-422, 1-Wire, GPRS/UMTS/LTE modem with two SIMs, TETRA support |
| SO-54SR-301 measurement | 3 voltages (dividers, VTs or sensors), 4 currents (3 phases + 3I0 in the Holmgreen connection) |
| Inputs/outputs | 16 inputs, 4 outputs |
| SO-52v21-AUT | modular or integrated: up to 3 fault indicators/sectionalizers, up to ten switching devices, 3G modem, detection of intermittent faults |
| APZ-20 | analyzer/indicator of short-circuit current flow |
Request a price and lead time
SO-54SR-3xx, SO-52v21-AUT, APZ-20 — overhead line disconnector controllers, fault indicators and sectionalizers. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8537 10 98 00 |
|---|---|
| HS, 6 digits | 8537 10 |
| CN (EU) | 8537 10 98 |
| HTSUS (USA) | 8537 10 91 70 |
| China customs tariff | 8537 10 90 90 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
Which currents and voltages does SO-54SR-301 measure?
The controller measures 3 voltages through dividers, VTs or sensors and 4 currents, that is, 3 phase currents and 3I0 in the Holmgreen connection. The discrete signal unit has 16 inputs and 4 outputs.
How many fault indicators does one SO-52v21-AUT implement?
In the modular configuration with mAI-32-31, up to three fault indicators or sectionalizers and up to ten switching devices. The integrated version with mCA-01-01 is designed for one indicator.
Where is the APZ-20 indicator installed?
On poles of MV overhead lines without disconnectors, for example on taps, or at points with a radio-controlled disconnector without short-circuit current detection. The set includes the SP-1 sensor and an SO-54SR-301 controller.
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