The end of earth blocks in panels
(at least, in our panels) The usual solution for earthing in a control panel is an earth block. Less commonly there may be an earth stud...
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The G&G Blog
- Mar 22
- 1 min
What's the full load current of the motor?
Every electrical engineer has needed to find out the full load current of a motor at one time or another, often to check what to set the...
112
- Mar 15
- 3 min
Relays - the things you always wondered
The humble relay in control panels is probably the component you're most likely to have worked with. But it's surprising how often some...
1,152
- Mar 8
- 2 min
What Isolators actually do (and installers don't know!)
This is the isolator on a control panel: Specifically, it's a Socomec one. You turn it off to cut power to the panel. So far so good....
75
- Mar 1
- 2 min
Do control panel enclosures need to be metal? The law.
Do control panel enclosures need to be metal? The law.
72
- Feb 23
- 3 min
Remote Motor Monitoring - Where is the industry?
Remote monitoring for pump control panels is massively in demand but no one has mastered it yet. Surely it can't be that hard! You can...
44
- Feb 16
- 2 min
What you are doing wrong with overloads
Thermal overloads are an important part of motor protection. When too much current passes through the overload it changes the state of...
309
- Feb 9
- 3 min
Troubleshooting Tips for Dual Pump Panel Faults
Let's give this some context. You're a pump engineer and you've been called out to a standard float-controlled wastewater pump station...
134
- Feb 2
- 2 min
The Pros and Cons of Building Your Own Panels
The question of whether having your own panel shop would save money is worth exploring. Firstly, it’s important to consider whether it...
62
- Jan 26
- 1 min
Wago lever terminals – a new era for control panels
Screw terminals should be done up to a specific torque given by the manufacturer. Fires are caused by screw terminals that aren’t...
31
- Jan 19
- 2 min
Replacing failed Hydrovar inverters
Let’s start by calling it – the previous generation of Hydrovar inverters had a flaw. Sometimes when the power to the inverters is...
78
- Jan 12
- 1 min
Electrical Symbols – Electronic Filters
What are the IEC symbols for frequency regulating products such as IRF filters and EMI filters.
23
- Jan 5
- 2 min
Why do stepping relays fail on pump control panels?
Every pump engineer up and down the country has replaced a stepping relay in a control panel. It's basically a rite of passage - you're...
127
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