Medium Voltage 11kV Cable Joint Demonstration

Remove 1 meter of the Red [Oversheath];to expose the [Armouring] – Single Layer of galvanised circular steel wires – to be cut away.

Insert collar under the [Armouring] and tighten with external collar.

Remove black [Sheath], [Tape Binder], white[Laying up] to expose the copper[Metallic Screen].

Remove black insulation Screen to expose grey insulation.

Repeat for 2nd Cable.

Expose 10cm of the conductor, clean, add insulation and prepare for insulation test.

Insulation test before mechanical connection of cable conductors.

IMG_6265

Remember to insert the final Oversheath in the last step before you joint the cable.

Mechanical joint of conductors, with heat shrink insulation and wrap over with braiding tape.

Wrapping of Armouring steel guard wire and testing insulation.

Weighted Decision Matrix –Selection of Supplier

Weighted Decision Matrix –Selection of Supplier

By:

Donna H. Rhodes, Principal Research Scientist, MIT

Weighted Decision Matrix-Selection of Supplier

Step-by-Step Process for Creating a Weighted Matrix:

  1. List all your options as the row labels on the table and list the factors (eg quality, location, reliability, and credit options)  that you need to consider as the column headings.
  2. Next, work out the relative importance of the factors in your decision.Show these as numbers from, for example, 0 to 5, where 0 means that the factor is unimportant in the final decision, and 5 means that it is very important.
  3. Next, work your way down the columns of your table, scoring each option for each of the factors in your decision. Score each option from 0 (poor) to 5 (very good).
  4. Now multiply each of your scores from Step 2 by the values for relative importance of the factor that you calculated in Step 3. This will give you weighted scores for each option/factor combination.
  5. Finally, add up these weighted scores for each of your options. The option that scores the highest wins!

Assuming quality is most important, and if you do the weighted analysis now, Supplier C will win.

Another Example :

Weighted Decision Matrix-Selection of Supplier-Example_17Jul2017

Lift & Escalators Standards : China vs British Standards

Comparison :China GuoBiao(GB) Standard & British Standards (BS)

中國人民共和國國家標準

GB stands for GuoBiao

British Standards (BS)
GB standards are the Chinese national standards issued by the Standardization Administration of China (SAC). British Standards are the standards produced by BSI Group which is incorporated under a Royal Charter (and which is formally designated as the National Standards Body (NSB) for the UK).
LIFT
GB 7588:2003 BS EN 81-1:1998
 GB 7588 2003  BS EN 81 1 1998
ESCALATOR  
GB16899:2011 BS EN 115-1:2008
 GB16899 2011

GB16899 2011

 BS EN 115-1 2008

 

LIFT GB and EN Standards Comparison 
Category BS EN 81-1:1998 GB 7588:2003
Machinery in a machine room 5.2.6.3.2.3 There shall be a clear vertical distance of at least 0,30 m above unprotected rotating parts of

the machine.

 

5.2.6.4.2 Dimensions of working areas inside the well

5.2.6.4.2.2 There shall be a clear vertical distance of at least 0,30 m above unprotected rotating parts of the machine.

There shall be a clear vertical distance of at least 0,30 m above unprotected rotating parts of

the machine.

 

Maximum Available Car Area 5.4.2 Available car area, rated load, number of passengers

Car area as per table 6 & 8

 

Car area as per chapter 8 table 1 & 2, allowance of not more than 5 %
Landing doors and car doors 5.3 Landing doors and car doors

5.3.1.4 When closed, the clearance between door panels, or between panels and uprights, lintels or sills,shall not exceed 6 mm.

 

 

This value, due to wear, may reach 10 mm, with the exception of doors made from glass

7 Landing Doors and Car Doors

Passenger Lift – the clearance between door panels, or between panels and uprights, lintels or sills,shall not exceed 6 mm.

Goods Lift, gap should not exceed 8mm

This value, due to wear, may reach 10 mm

Lift Safety Gear 5.6.2.1.2.1 Car safety gear

Car safety gear:

a) shall be of the progressive type, or

b) may be of the instantaneous type if the rated speed of the lift does not exceed 0,63 m/s.

 

5.6.2.1.2.3 The safety gear of the counterweight or balancing weight shall be of the progressive type if the rated speed exceeds 1 m/s, otherwise the safety gear may be of the instantaneous type.

 

9.8.2.1 may be of the instantaneous type if the rated speed of the lift does not exceed 0,63 m/s.

 

9.8.2.3 The safety gear of the counterweight or balancing weight shall be of the progressive type if the rated speed exceeds 1 m/s, otherwise the safety gear may be of the instantaneous type

 

 

Appendix D

Rated Load and Maximum Car Area

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8.1 轿厢高度

 

 

 

 

 

 

 

 

Number of Passenger and minimum car area

 

 

 

 

 

 

 

 

 

 

 

8.2.3 乘客数量

 

 

 

 

 

 

 

 

ESCALATOR GB and EN Standards Comparison 
Category BS EN 115-1:2008 GB16899:2011
Supporting structure (truss) 5.2.5 Structural design

Based on the rated load, the maximum calculated or measured deflection shall not exceed 1/750 of the

distance l1 between the supports

5.2.5 Structural design

Based on the rated load, the maximum calculated or measured deflection shall not exceed 1/750 of the

distance l1 between the supports.

 

Public Transport escalator and travellator deflection should not exceed 1/1000.

Auxiliary brake 5.4.2.2 Auxiliary brake

5.4.2.2.1 Escalators and inclined moving walks shall be equipped with auxiliary brake(s) if:

c) the rise h13 exceeds 6 m (see also H.2).

 

H.2 Escalators or moving walks for public transport

it is recommended to install auxiliary brakes also for rises h13 less than 6 m.

5.4.2.2 Auxiliary brake

5.4.2.2.1 Escalators and inclined moving walks shall be equipped with auxiliary brake(s) if:

c) the rise h13 exceeds 6 m (see also H.2).

 

H.2 Escalators or moving walks for public transport

auxiliary brakes must be installed for rises h13 less than 6 m.

Stopping 5.12.2.2.4 Stopping initiated by monitoring or electric safety devices (revised in 2014 version)

5.12.2.2.4.1 In case of any event detected by a monitoring or electric safety device as listed in Table 6 the driving machine shall be prevented from starting or shall be stopped immediately before a restart procedure

5.12.2.2.4 Stopping initiated by monitoring or electric safety devices

5.12.2.2.4.1 In case of any event detected by a monitoring or electric safety device as listed in Table 6 the driving machine shall be prevented from starting or shall be stopped immediately before a restart procedure.

Monitoring of status is complusory

Steel Standards Structural Steel Standards

EN10025-1, EN10025-2, EN10025-3, EN10025-4, EN10025-5, EN10025-6

Quenched and Tempered steel

EN 10083-1, EN 10083-2, EN 10083-3

GB/T 699, GB/T 700, GB/T 1581, GB/T3007,

GB/T 4171 & GB/T 6270

Electronic components Standards EN61249, HD21.3S3, HD21.4S2, HD21.5S3, HD22.4S4 GB/T 5023.3 ,GB/T 5023.4,GB/T 5023.5

GB/T 5013, GB5014

Requirements for Monitor and electrical safety devices

Latest Lightning protection standards in Greater China

Normative lightning and surge protection requirements

Lighting Image 01

 

 

 

 

Design and Application Standards

IEC 62305:2010 (Part 1/2/3/4 )
IEC 60364 (Part 1/4/5)

Requirements & Testing Standards

IEC 62561:2012 (Part 1/2/3/4/5/6/7)
IEC 61643:2011 (Part 11/21)

Lightning protection standard
IEC 62305:2010

Lighting Standard breakdown 02

 

 

 

 

 

Connection between the various parts of IEC 62305

03_Connection between the various parts of IEC 62305

 

 

 

 

 

 

 

 

 

 

 

 

Class of Lightning protection system (LPS) based on IEC 62305-1.

04_Lighting Protection Level Class

 

 

 

 

 

The discrepancy between latest IEC standards and UK standards

Now,
BS EN 62305 = IEC 62305
BS EN 50164 = IEC 62561
to supersede the previous standard, BS 6651:1999

The UK lightning protection standard which was Hong Kong followed, BS 6651 has been withdrawn in August 2008, and now BS EN/IEC 62305 is the recognized standard for lightning protection.

05_difference between BS 6651 & BS EN IEC 62305

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Above information extract from seminar given by

Tero Du 杜天良
DEHN + SÖHNE
DEHN SURGE PROTECTION
(SHANGHAI) CO., LTD
http://www.dehn-international.com
Member of the meteorology society of China

Seminar made possible by Society Of Operations Engineers (Macau Region)