Test Station
Test Station
Designed to control operation of the insulating monolithic joint and efficiency evaluation of pipeline electrochemical protection. It is supplied with a resistance control unit and reference electrodes.
Spark gap
Spark gap
Serves as a safety device, which eliminates any breakdown of an insulator of insulating monolithic joint in case of surge overvoltage inside a pipeline. Explosion-proof.
| Technical characteristic | Value |
|---|---|
| Lightning impulse current (10/350 µs) |
100 кА |
| Charge |
50 Aс |
| Specific energy | 2500 kJ / Ohm |
| Nominal pulse breakdown voltage (1,2/50 µs) |
1400 V |
| Nominal power-frequency withstand voltage |
285 V |
| DC withstand voltage |
350 V |
| Separation resistance at 175V DC |
> 100 Mohm |
| Ambient temperature range |
-60…+80 °C |
| Protection rating |
IP67 |
SGMM sensor on the spark gap
SGMM-HGS 100 Ex Spark gap Monitor Module
The spark gap monitor module (SGMM) is intended to assess the operation integrity and calculate the residual life of HGS100 Ex while in operation.
An underground part is a current sensor with an built-in connecting cable. A current sensor is intended for non-contacting registration of current impulses, which go through the spark gap while its operating.
SGMM controller, installed inside a Test Station
An aboveground part of SGMM is a controller. It is intended to determine the impulse parameters (amplitude, width, charge, date and time) and to save data in a volatile store. Also the controller shows residual life of a spark gap or SGMM battery.
| Parameter name | Conditions | Value |
|---|---|---|
| Maximum permissible amplitude of current impulse, A | Impulse 8/20 µs | 150000 |
| Impulse 10/350 µs | 100000 | |
| Range of permissible relative amplitude measurement error, %, not more | if IA ≥ 0, 01* Imax, Timp ≥ 16 µs, where Timp – duration of the current impulse by level 0,5*IA |
±15 |
| Range of permissible relative width measurement error, %, not more | ±15 | |
| Maximum permissible relative charge measurement error, %, not more | ±15 | |
| Climatic version according to GOST 5150 | Aboveground part |
Md1, but with operating temperature limits: |
| Underground part | Md5 with operating temperature limits: -5°С…+35°С |
|
| Current sensor explosion-proof according to GOST R MEK 60079-18-2012 | - | 1 Ех mb II T6 Gb X |
| Protection rating of environmental impact and connecting with current-conductive parts | Current sensor case | IP68 |
| Controller case | IP40 | |
| Design life, years | Aboveground part | 15 |
| Underground part | 35 | |
| Maintenance intervals, years | - | 1 |
| Permissible cable length, not less, m | - | 6 |