According to the utility that serves Kowloon, the New Territories and most outlying islands, an 11,000-volt underground cable failed in one of its transformer rooms, cutting power to 388 customers for almost 1½ hours at On Mei House in Cheung On Estate at 9.38am on Sunday.
The estate is located about a block away from Nga Ying Chau Street, the source of another outage on New Year’s Day.
The Environment and Ecology Bureau said it was “extremely concerned and shocked” that two areas in Tsing Yi had suffered power outages within a week.
In a separate statement, also on its Facebook page, the bureau said Secretary for Environment and Ecology Tse Chin-wan had expressed his “great disappointment” to CLP managing director Joseph Law Ka-chun over the two power outages occurring in a short period of time.
The bureau said CLP had been told to immediately conduct a comprehensive review of its power supply system and carry out maintenance to prevent a repeat of the incident.
Voltage dip in Hong Kong traps 20 people in lifts, sets off fire alarms
Voltage dip in Hong Kong traps 20 people in lifts, sets off fire alarms
A company spokesman said power had been restored at 11.04am, 1 hour and 26 minutes after it went down.
“CLP Power immediately began work to restore the power supply to affected customers,” the spokesman said.
A voltage dip in an electrical substation on Nga Ying Chau Street on New Year’s Day trapped more than a dozen residents in lifts and set off fire alarms in Kwai Chung, Tsuen Wan, Tsing Yi, Ma On Shan and Sha Tin.
On Mei House is located about 200 metres (656 feet) away from Nga Ying Chau Street.
The CLP spokesman said that the two outages were not connected, but engineering personnel had been assigned to inspect the power supply equipment at the estate.
“CLP Power attaches great importance to safe and reliable power supply and will strictly investigate and follow up,” he added.
The bureau voiced its concerns over the seriousness of the outage, calling for an explanation.
“As the incident is very serious, we are very concerned about the impact and safety concerns of the public and have instructed CLP Power to send someone to explain immediately,” the bureau said.
The Electrical and Mechanical Services Department also sent personnel to the scene to investigate.
The department and CLP have both been instructed to follow up and submit a report to the bureau.
Last week, the department told CLP to submit a report on the New Year’s Day incident to them within four weeks.
The bureau will also look into where the government can strengthen supervision to improve the performance of power companies.