تتفقد شركة الكهرباء القابس بعد الماس الكهربائي وتفصل التيار الكهربائي.

Because the subject is شركة الكهرباء (the electricity company), and شركة is a grammatically feminine singular noun.

A few key points:

• شركة ends in ـة, which is a common sign of a feminine noun.
• In Arabic, verbs agree with their subject in gender.
• Since the sentence begins with the verb, this is a verb–subject order sentence, so the verb appears in the singular form.

So:

• تتفقد = she/it inspects
• تفصل = she/it disconnects/cuts off

Here, she/it refers to the company.

Because Arabic very often uses verb–subject–object order, especially in formal written language like MSA.

So this structure is very normal:

• تتفقد شركة الكهرباء القابس = literally Inspects the electricity company the plug

In natural English, we would reorder it as:

• The electricity company inspects the plug

Arabic can also use subject–verb order in some contexts, but starting with the verb is extremely common in MSA.

This is an iḍāfa construction, often called a genitive construction or noun-of-noun structure.

• شركة الكهرباء literally means company of electricity
• In natural English: the electricity company

In an iḍāfa:

• the first noun usually does not take ال
• the second noun determines whether the whole phrase is definite

So:

• شركة كهرباء = an electricity company
• شركة الكهرباء = the electricity company

Because الكهرباء is definite, the whole phrase is definite.

القابس has ال, so it means the plug rather than a plug.

Arabic often uses the definite article when referring to:

• a specific known item
• the item involved in the situation already being discussed
• something understood from context

So in this sentence, it is not just any plug in general, but the plug relevant to the incident.

Usually, قابس means plug or connector.

However, in real-life usage, technical terms can vary a bit by region and context. In some contexts learners may confuse it with socket/outlet, but the more standard distinction is often:

• قابس = plug
• مقبس = socket / outlet

So if you are learning MSA, plug is a good understanding for القابس here.

الماس الكهربائي refers to an electrical short, short circuit, or an electrical contact fault, depending on context.

Literally:

• ماس = contact / touching / short
• كهربائي = electrical

So the phrase means something like:

• the electrical short
• the short circuit
• the electrical fault

In practical translation, short circuit is often the most natural choice.

Because الكهربائي is an adjective meaning electrical or electric, and it must agree with the noun it describes.

In Arabic, adjectives agree with the noun in:

• definiteness
• gender
• number
• case

So:

• الماس الكهربائي = the electrical short
• التيار الكهربائي = the electric current

Both nouns are definite, so the adjective is also definite with ال.

بعد means after.

So:

• بعد الماس الكهربائي = after the electrical short

Grammatically, the noun after بعد is in the genitive case in fully inflected Arabic.

So in full vocalization, you would have:

• بعدَ الماسِ الكهربائيِّ

Even if short vowels are usually not written, that is the underlying grammar.

Because Arabic, like English, does not need to repeat the subject when the same subject continues.

So:

• تتفقد شركة الكهرباء القابس
• وتفصل التيار الكهربائي

means:

• The electricity company inspects the plug
• and disconnects the electric current

The subject شركة الكهرباء still applies to both verbs.

This is completely normal Arabic style.

Literally, it means:

• it separates/cuts off the electric current

In natural English, this is usually translated as:

• it cuts off the electricity
• it disconnects the power
• it shuts off the electric current

So فصل here has the practical sense of disconnecting or cutting off power.

There are two main verbs, and each has its own object:

1. تتفقد takes القابس

   • تتفقد ... القابس
   • inspects ... the plug

2. تفصل takes التيار الكهربائي

   • تفصل ... التيار الكهربائي
   • disconnects ... the electric current

So:

• القابس = object of تتفقد
• التيار الكهربائي = object of تفصل

A fully vocalized version would be:

تَتَفَقَّدُ شَرِكَةُ الكَهْرَبَاءِ القَابِسَ بَعْدَ المَاسِ الكَهْرَبَائِيِّ وَتَفْصِلُ التَّيَّارَ الكَهْرَبَائِيَّ.

Here is why:

• تتفقدُ → indicative verb
• شركةُ → subject, so nominative
• الكهرباءِ → second term of iḍāfa, so genitive
• القابسَ → direct object, so accusative
• بعدَ → fixed form here
• الماسِ → genitive after بعد
• الكهربائيِّ → adjective matching الماسِ, so genitive
• تفصلُ → indicative verb
• التيارَ → direct object, so accusative
• الكهربائيَّ → adjective matching التيارَ, so accusative

This is helpful for understanding the grammar, even though these endings are usually not written in everyday Arabic text.