ATG-SG4set
GSM transmitter in a housing with a power supply and internal antenna, in the container. It reports the operation of the alarm contacts and the door contact to the service team by text and call (CLIP).
Quantity: 1
Example configurationEnergy
A solar farm with no on-site staff: text alarms to the service team, a gate for work crews
GSM alerts from selected alarm contacts of a farm 40 km from the service base, and a gate opened by a phone call for service and grass-mowing crews — with no gatehouse and no keys to hand out.
- 2 MWfarm capacity
- 40 kmto the service base
- 0gate keys for crews
01 / Investment context
What problem does this configuration solve?
The 2 MW solar farm stands in open country behind a fence with an entrance gate. It has a transformer station and an equipment container, but no gatehouse — normally nobody is there. The service team is based 40 km away.
The owner wants the service team to know at once when a protection device trips, an inverter stops or someone opens the container. Every hour of downtime is lost production, and an open container door may mean a break-in.
Crews come in regularly: the service team, the grass-mowing contractor, sometimes an inspection. Handing out and collecting gate keys for each of them is a nuisance, and a lost key means changing the lock.
The investor’s goal: A text message about selected events straight to the service team’s phone, and entry for authorised crews without handing out keys.
How does this configuration work?
A GSM transmitter in a housing with a power supply (ATG-SG4set), backed up by a battery, works in the container. Connected to it are the alarm contacts provided by the inverters and the station’s protection devices, and a reed contact on the container door. When a contact operates, a text message goes to the service team, and a call (CLIP) makes it harder to miss.
The gate is opened by a GSM controller (GSU-K02/L) in the gate operator’s cabinet. A crew member calls the controller’s number from a phone on the list; the controller recognises the number and does not answer, so the call costs nothing, and its output sends a signal to the operator’s “open” input. After the vehicle has passed, the operator’s automation closes the gate. When a crew has finished its work, its number is removed from the list.
This passes on selected states; it is not energy production monitoring or part of the grid protection. Metering, inverter logging and the farm’s protection system work as before, and the GSM transmitter only says that something needs attention.
02 / Operating principle
From signal to action.
Selected alarms from the farm go by text to the service team, and crews open the gate with a phone call.
Alarm to the service team
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01 / Signal source
Alarm contacts Selected states of the farmAn inverter, a protection device or the container door changes state.
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02 / Transmission
ATG-SG4set GSM transmitter in the containerWhen a contact operates, a text and a call (CLIP) go to the service team.
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03 / Notification
Phone Service team, 40 km from the farm Text message + CallThe text and the call say that something at the farm needs attention.
The service team learns of an event at once, not at the next inspection. This passes on selected states and is not production monitoring: the farm’s metering and protection work as before.
Crew access
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01 / Signal source
Phone Crew member, listed numberCalls the controller, which does not answer, so the call costs nothing.
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02 / Reception
GSU-K02/L GSM controller in the operator’s cabinetRecognises a listed number and sends a signal to the operator’s “open” input.
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03 / Action
Gate Entrance to the farmOpens, and after passage the operator’s automation closes it.
Crews get in without keys. When the work is done, the crew’s number is removed from the list — no collecting keys and no changing locks.
A simplified functional diagram.
03 / Installation components
Devices in this configuration
An example selection — the number of devices depends on the site.
Installation component
Backup battery for the ATG-SG4set
Keeps the GSM transmitter running when the container loses power. Not included in the set — chosen separately.
Quantity: 1
Installation component
Container door contact
Magnetic sensor on the container door: opening the door changes the state of a GSM transmitter input and triggers a text message.
Quantity: 1 per door
GSU-K02/L
GSM gate controller in the operator’s cabinet: a call from a listed number is free of charge (CLIP), and the controller’s output sends a signal to the operator’s “open” input.
Quantity: 1
AMD-G30
Magnetic-base 5 dBi GSM antenna on the container roof — if the steel walls weaken the signal of the internal antenna.
Quantity: optional
Catalogue figures describe a device under stated conditions, usually in open terrain, and are not a guaranteed range in every installation. Device quantities in the examples are indicative.
04 / Value for the investor
What does this solution give you?
Events known at once
A protection trip or an inverter fault reaches the service team’s phone at once, not at the next inspection or in the production statement.
Entry without keys
A crew opens the gate with a call from a listed phone; when the work is done its number is removed from the list — no collecting keys and no changing locks.
Only the states that matter
No SCADA system and no permanent link: the transmitter passes on only selected states that call for a service visit.
05 / Before installation
What needs to be settled for a similar investment?
Before devices are chosen, what matters is the site’s conditions and how the system ties into the final installation.
Requirements to verify
- The GSM transmitter is not an intrusion alarm system: the door contact only says that the door has been opened, and the response — a visit by the service team or a security firm — has to be planned separately.
- Which of the farm’s devices have volt-free alarm contacts — only states that the inverters and protection devices put out on a contact can be passed on.
- Which events the text messages should tell apart and who besides the service team should be notified — the GSM transmitter’s configuration and the wiring of the contacts depend on this.
- Mobile coverage in the container and at the gate; the external antenna depends on it.
- A gate operator with an “open” input and automatic closing with photocells, and who keeps the list of crew numbers.
Example configuration — it needs a technical selection for your site.
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