ISS-1 time synchronization device
Category: Time synchronization
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ISS-1 is intended for continuous (24H) reception of signals from GLONASS/GPS global navigation satellite systems, conversion of these signals, and generation of exact time synchronization signals.
It can be used in Wide Area Measurements Systems (WAMS), at digital substations, in automated systems for measuring, monitoring, signaling and control of power facilities of power suppliers or power consumers, at power generation and transmission facilities.
Main functions
- Reception of signals from global navigation satellite systems such as GLONASS and GPS
- Generation of precise time signals in one of the following forms: 1PPS, IRIG-B, IEEE 1344, 10 MHz
- Indication of operating mode
- Self-diagnostics, including continuous antenna monitoring (failure in antenna connections and shortcircuits)
- Warm start mode: reduction of satellite search time and synchronization time in case of a unit`s fixed location
- Digital outputs for alarms and warnings signaling
- Software-based configuration management
Global navigation satellite system`s signal receiver type
32 channel reception module of standard accuracy (support for GLONASS and GPS), L1 range
Antenna type
3-5 V rated, active GPS/GLONASS L1 antenna. 26–49 dB amplification, BNC connector
Average time until synchronization is achieved
|
cold start (location is not defined and is not fixed) |
up to 2 min |
|
warm start (without change in location) |
up to 30 s |
| hot start (loss of signal without power supply loss) | up to 20 s |
Time signals outputs
| number of BNC output interfaces (TTL, 50 Ohm) | 2 |
| number of RS-232 output interfaces (DB9, 9600-115200 baud, NMEA 0183 – RMC) | 1 |
| output signals format | IRIG-B004,IRIG-B007 (IEEE 1344), 1PPS, 10 MHz, N pulses/s, 1 pulse per N s |
Accuracy ratings
| 1PPS front binding to UTC, GLONASS and GPS scale – permissible absolute error | ±1 μs |
| 1PPS front binding to UTC, GLONASS and GPS scale – permissible absolute error (at confidential probability of 0,95) |
±200 ns |
| permissible absolute error of autonomous storage and playback of internal timescale if the synchronization is lost | ±5 ms/day |
| permissible relative error of 10 MHz output signal according to frequency | up to ±15*10-9 MHz |
Power supply
| DC supply voltage range | 120–370 V |
| AC supply voltage range | 100–260 V |
| power consumption | up to 10 W |
Operating conditions
| operating temperature range | -40...+55° С |
| relative air humidity | 90% at 30°С |
| atmospheric pressure | 460–800 mm Hg |
| enclosure protection category | IP50 as per IEC 529-89 |
Design
| metal enclosure with DIN-rail mounting bracket | |
| overall dimensions (WxHxD) | 105х104хup to160 mm |
| weight | up to 2 kg |
