Sigma D⁺⁺⁺
Error direction indicator
The Sigma D++ is a combined short-circuit direction and earth fault direction indicator for medium-voltage networks. The current is measured via phase current sensors. The measuring voltage can be tapped via integrated voltage test systems (Wega series), via HR / LRM interfaces or probes with capacitive decoupling. Additional earth fault detection methods are available in the Sigma D++ for the various neutral point treatments (extinguished and isolated systems).
The earth fault wiper method only requires three phase current sensors, but requires the auxiliary power supply to be connected. A summation current sensor can be connected as an option. No auxiliary voltage is required for all other fault location methods if the operating current >is 5 A.
Product features
- Transformer-powered short-circuit direction indicator and earth fault direction indicator for all networks and neutral point treatments
- Requires only three phase current sensors for all earth fault location methods
- Earth fault detection with up to five different earth fault detection methods, can also be combined
- Independent, fully automatic voltage calibration
- Simple and flexible parameterization via DIP switch or USB
- Event memory for error evaluation
- LED status display, multicolor
- Remote signaling via freely programmable signal relays
- Sigma Explorer software: Commissioning, parameterization and reading out the fault memory via the front USB port
- With wide-range power supply 24 V to 230 V AC/DC
Phase-selective short-circuit and earth fault display
Clear error direction display
Differentiation between short-circuit and earth fault
Status indicator LED
Your added value
- Immediate error direction detection
- Fast commissioning and parameterization
- On-site monitoring with USB and notebook
Reverse polarity protected plug-in terminals for quick and easy installation
Connection for voltage coupling (Wega)
Technical data
| Sigma D++ | |
|---|---|
| Short-circuit indicator | ✅ |
| Earth fault indicator | ✅ |
| Earth fault location method | Continuous earth fault, earth short circuit, cos φ and sin φ methods, pulse detection, earth fault wiper |
| I>> Response values Short-circuit current |
|
| tI>> Response delay | DIP: 40, 80 ms; SW: 40 ms – 60 s |
| IES> / IES>> Earth fault current response values | DIP: off, 20, 40, 60, 80, 100, 120, 160 A; SW: 10 – 1,000 A (1 A steps) |
| tIE> Response delay | DIP: 80, 160 ms; SW: 40 ms – 60 s |
| IET> Response values earth fault wiper method | 10 – 500 A |
| IEP> Response values Active residual current cos φ | 2 – 200 A |
| IEQ> Response values Reactive current sin φ | 2 – 200 A |
| tIEP> / tIEQ>Response delay | 40 ms – 60 s |
| ΔIE> Response values for pulse detection (clock stroke) | 1 – 100 A |
| Measuring accuracy phase currents | 3 % (0 – 630 A, resolution 1 A)5 % (630 – 1,500 A)10 % (1,500 – 2,000 A) |
| Display |
|
| Remote signaling / communication | 4 potential-free, freely programmable relay contacts |
| Parameterization |
|
| Remote signaling contact | 4 permanent or wiping contacts (1 s), NC or NO contact Contact rating: 230 V AC / 1 A / 62.5 VA max.;220 V DC / 1 A / 60 W max. |
| Voltage calibration | Manual / Automatic |
| Reset |
|
| Supply | |
| Converter power supply | ✅ |
| External auxiliary voltage | 24 – 230 V AC/DC possible (necessary for earth fault wiper) |
| Internal power supply | Long-life lithium cell; service life ≥20 years |
| Total current sensor | optional |
| Housing | Polycarbonate, IP40 |
| Temperature range | -30 °C to +70 °C |
All important documents for the device
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Matching articles
PERFECT MATCH
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Other short-circuit and earth fault indicators
Sigma D
- Phase-selective short-circuit indicator with direction indicator
- Earth short-circuit monitoring with direction indication in NOSPE networks and OSPE networks with "open" rings
- Current measurement via phase current sensors.
Sigma D+
- Phase-selective short-circuit indicator with direction indicator
- Earth shot location method for all neutral point treatments in MV networks
- Earth fault detection with 5 detection methods with total current sensor
Sigma DM
- OLED display for good readability in all lighting conditions
- Display of measured values and configuration via the display
- Quick and easy to operate rocker switch
Sigma L series
- Clear error type display with differentiated LED display
- Flexible adjustment of the triggering criteria for short-circuit trips
- Transmission of data via the 868 MHz radio frequency with LoRaWAN protocol