Questions
1. After powering an inverter fully OFF, how long must you wait before opening any cover or touching internal conductors?- A. 30 seconds — the display going dark is the signal
- B. 5 minutes — timed, regardless of display state
- C. 15 minutes — only for battery work
- D. No wait is needed if the PV DC switch is open
2. The Kent G3 PV DC switch may only be operated when the string current is below:
- A. 5 A
- B. 2 A
- C. 0.5 A
- D. Any value — the switch is rated for full load
3. Who may open an inverter enclosure to work on internal parts?
- A. Any licensed electrician on site
- B. The installing technician, provided the 5-minute discharge wait has passed
- C. Nobody in the field — there are no user-serviceable parts inside; internal work is Kent service only
- D. The customer, for dust cleaning using a dry cloth
4. During normal operation, the Kent G3 heatsink surface can reach approximately:
- A. 45 °C
- B. 60 °C
- C. 75 °C
- D. 95 °C
5. The correct power-OFF sequence on both Kent platforms is:
- A. The exact reverse of power-on — battery side off first, grid AC last
- B. Grid AC off first, then battery
- C. PV DC switch first, always
- D. Any order, as long as the display is dark before disconnecting battery
6. PPE must be worn:
- A. Only during battery terminal work
- B. Only when the inverter is energised and running
- C. Throughout the entire installation process, from arrival to sign-off
- D. Only during AC termination work at the DB
7. For battery work specifically, the manual’s footwear and hand protection rule is:
- A. Cotton gloves are sufficient for low-voltage packs
- B. Rubber shoes and insulating gloves
- C. Standard site safety boots are adequate
- D. No specific rule — follow general site PPE
8. Grid protection points — voltage and frequency trip settings — may be changed:
- A. By the installer whenever the local DISCOM supply seems unstable
- B. Freely, if export readings look wrong
- C. Once per season to match seasonal voltage profiles
- D. Only with utility consent, by authorized personnel, using the Kent-issued parameter sheet
9. After completing the labelled 5-minute discharge wait, and before touching any conductor, you must also:
- A. Tap the terminals with an insulated tool to check for spark
- B. Meter-verify that no dangerous voltage remains on the relevant conductors
- C. Wait a further 5 minutes as an additional buffer
- D. Nothing further — the timed wait alone is sufficient per the manual
10. The Kent rule for the earth-pit resistance reading at every installation site is:
- A. Measure the earth resistance and photograph the reading; escalate poor soil to Kent before energising
- B. Assume the builder’s earth is adequate for a residential installation
- C. Only measure on commercial or industrial sites
- D. Quote the manual’s reference figure to the customer as the confirmed site resistance
Answer key
| Q | Answer | Why |
|---|---|---|
| 1 | B | The manual specifies a 5-minute wait after full power-off before opening any cover. The display state is not the trigger. |
| 2 | C | The 0.5 A arc-prevention rule applies to the Kent G3 DC switch. Operating under load risks a DC arc. |
| 3 | C | Neither platform has user-serviceable parts inside. Opening the enclosure in the field is not permitted — internal work is Kent service. |
| 4 | C | The Kent G3 heatsink can reach 75 °C during operation. Do not touch the heatsink during or shortly after operation. |
| 5 | A | Power-off is the exact reverse of power-on: battery (and any GEN source) off first, then grid AC. |
| 6 | C | PPE applies throughout the entire installation process, not only at specific steps. |
| 7 | B | The manual’s battery safety instructions specify rubber shoes and insulating gloves for battery work. |
| 8 | D | Grid protection points are utility-consent settings. They are never adjusted freely by the installer or by improvisation. |
| 9 | B | After the discharge wait, verify dead with a meter before touching conductors. The wait alone is not a substitute for measurement. |
| 10 | A | Measure and photograph the earth-pit reading at every site. Escalate poor soil results to Kent before energising — never assume the builder’s earth is adequate. |